121-9144 WIRING GP-SECONDARY STEERING S/N 6TL1-409 PART OF 127-1481 STEERING AR-SECONDARY AN ATTACHMENT M312

ELECTRICAL AND STARTING SYSTEM

WIRING GP

0. 121-9144 WIRING GP-
1. 121-2452 WIRING GP-

POWER TRAIN

AXLE GP

2. 124-2920 AXLE & MTG
3. 131-3110 AXLE & MTG
4. 123-9727 AXLE & TRA
5. 131-2904 AXLE & TRA
6. 124-2921 AXLE AR-FR
7. 123-9726 AXLE AR-RE
8. 123-9728 AXLE AR-RE
9. 131-3112 AXLE AR-RE
0. INFORMATION

EXCAVATOR M312 EXCAVATOR 6TL
M312 Excavator 6TL00001-00409 (MACHINE) POWERED BY 3054 Engine SEBP2433 M312 6TL (1988)

ELECTRICAL AND STARTING SYSTEM

WIRING GP

123-9719 WIRING GP-PLATFORM

141-3995 WIRING GP-PRIORITY VALVE

121-9144 WIRING GP-SECONDARY STEERING

121-2452 WIRING GP-UNDERCARRIAGE/SWIVEL

#SEBP24330140

121-9144: WIRING GP-SECONDARY STEERING

WIRING GP-SECONDARY STEERING

121-9144 WIRING GP-SECONDARY STEERING
S/N 6TL1-409
PART OF 127-1481 STEERING AR-SECONDARY
AN ATTACHMENT

i00487377 SEBP2433

1219144 WIRING GP-SECONDARY STEERING Parts scheme

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3E-0075 Y	[1]	SWITCH GP-MAGNETIC (24-VOLT)(SUPPLEMENTAL STEER)
2.	117-4861 C	[1]	RELAY AS
3.	122-2364	[1]	WIRE AS
4.	132-6640 CY	[1]	CONTROL GP-SECONDARY STEERING
5.	155-2276	[1]	WEDGE-PLUG LOCK (3-PIN)
6.	175-3350	[1]	PLUG AS-CONNECTOR
7.	179-9050 C	[1]	HARNESS AS
8.	096-4835 CM	[2]	BOLT-SOCKET HEAD (M10X1.5X16-MM)
9.	8T-4121 C	[2]	WASHER-HARD (11X21X2.5-MM THK)
10.	8T-4171 M	[2]	BOLT (M6X1X12-MM)
11.	9X-8256	[2]	WASHER (6.6X12X2-MM THK)
12.	096-0061 B	[15]	STRAP-CABLE
13.	186-3736	[4]	SOCKET-CONNECTOR (16-GA TO 18-GA)
	B		USE AS REQUIRED
	C		CHANGE FROM PREVIOUS TYPE
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP24330141

121-2452: WIRING GP-UNDERCARRIAGE/SWIVEL

WIRING GP-UNDERCARRIAGE/SWIVEL

121-2452 WIRING GP-UNDERCARRIAGE/SWIVEL
S/N 6TL1-409
PART OF 123-9451 STABILIZER AR
AN ATTACHMENT

i00480570 SEBP2433

1212452 WIRING GP-UNDERCARRIAGE/SWIVEL Parts scheme

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5W-3624	[1]	TERMINAL
2.	8U-1639	[1]	CAM AS
3.	121-2972	[1]	HARNESS AS
4.	121-2974 Y	[1]	SWITCH GP-SWIVEL
5.	8T-0337 M	[4]	SCREW-MACHINE (M4X0.7X12-MM)
6.	5C-9553 M	[2]	BOLT (M6X1X16-MM)
7.	9X-6772 B		STRAP-CABLE
	B		USE AS REQUIRED
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP24330142

124-2920: AXLE & MTG AR-FRONT

AXLE & MTG AR-FRONT

124-2920 AXLE & MTG AR-FRONT
S/N 6TL1-409
PART OF 123-9723 POWER TRAIN AR

i00516720 SEBP2433

1242920 AXLE & MTG AR-FRONT Parts scheme

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5W-2817	[2]	FITTING-GREASE
2.	110-2170	[1]	PIN
3.	111-1230	[2]	PLATE AS
4.	124-2921 Y	[1]	AXLE AR-FRONT
5.	5P-8247	[1]	WASHER-HARD (17X32X3.5-MM THK)
6.	6V-5844 M	[8]	BOLT (M16X2X35-MM)
7.	8T-0282 M	[1]	BOLT (M16X2X120-MM)
8.	8T-4132 M	[1]	NUT (M16X2-THD)
9.	163-7180 B	[1]	SHIM (0.5-MM THK)
	B		USE AS REQUIRED
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP24330143

131-3110: AXLE & MTG AR-REAR

AXLE & MTG AR-REAR

131-3110 AXLE & MTG AR-REAR
S/N 6TL1-409
WITH DRUM BRAKE
AN ATTACHMENT

i00508470 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6V-4433	[2]	FITTING
2.	136-8482	[2]	ADAPTER
3.	7Y-1858	[16]	WASHER (21X37X3-MM THK)
4.	132-4618	[2]	ADAPTER AS
5.	123-8324	[2]	CAP
6.	131-2904 Y	[1]	AXLE & TRANSMISSION AR
7.	132-4602 I	[2]	HOSE AS
8.	3J-1907	[2]	SEAL-O-RING
9.	6V-7688 M	[8]	LOCKNUT (M20X2.5-THD)
10.	8T-0656 M	[8]	BOLT (M20X2.5X150-MM)
11.	8T-7876	[2]	SEAL-O-RING
	I		REFER TO HYDRAULIC INFORMATION SYSTEM
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP24330144

123-9727: AXLE & TRANSMISSION AR

AXLE & TRANSMISSION AR

123-9727 AXLE & TRANSMISSION AR
S/N 6TL1-409
PART OF 123-9726 AXLE AR-REAR

i00516080 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name
123-9728 Y	[1]	AXLE AR-REAR
124-3478 Y	[1]	TRANSMISSION AR
Y		SEPARATE ILLUSTRATION

#SEBP24330145

131-2904: AXLE & TRANSMISSION AR

AXLE & TRANSMISSION AR

131-2904 AXLE & TRANSMISSION AR
S/N 6TL1-409
PART OF 131-3110 AXLE & MTG AR-REAR
AN ATTACHMENT

i00508373 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name
131-3112 Y	[1]	AXLE AR-REAR
124-3478 Y	[1]	TRANSMISSION AR
Y		SEPARATE ILLUSTRATION

#SEBP24330146

124-2921: AXLE AR-FRONT

AXLE AR-FRONT

124-2921 AXLE AR-FRONT
S/N 6TL1-409
AXLE & DISC BRAKES
PART OF 124-2920 AXLE & MTG AR-FRONT

i00516723 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	132-3688	[1]	GEAR AS-PINION
2.	9R-6814 B	[1]	WASHER (88X104.6X1.5-MM THK)
	9R-6805 B	[1]	WASHER (88X104.6X0.9-MM THK)
	9R-6806 B	[1]	WASHER (88X104.6X0.95-MM THK)
	9R-6807 B	[1]	WASHER (88X104.6X1-MM THK)
	9R-6808 B	[1]	WASHER (88X104.6X1.05-MM THK)
	9R-6809 B	[1]	WASHER (88X104.6X1.1-MM THK)
	9R-6810 B	[1]	WASHER (88X104.6X1.15-MM THK)
	9R-6811 B	[1]	WASHER (88X104.6X1.2-MM THK)
	9R-6812 B	[1]	WASHER (88X104.6X1.25-MM THK)
	9R-6813 B	[1]	WASHER (88X104.6X1.3-MM THK)
	9R-6801 B	[1]	WASHER (88X104.6X0.7-MM THK)
	9R-6802 B	[1]	WASHER (88X104.6X0.75-MM THK)
	9R-6803 B	[1]	WASHER (88X104.6X0.8-MM THK)
	9R-6804 B	[1]	WASHER (88X104.6X0.85-MM THK)
3.	203-0214	[1]	SEAL-O-RING
4.	220-2593	[2]	BUSHING-SLEEVE
5.	164-5912 M	[2]	LOCKNUT (M27X1.5-THD)
6.	128-7901	[1]	ELBOW AS
7.	8U-2354 B	[2]	SHIM (6-MM THK)
	5W-6405 B	[2]	SHIM (6.5-MM THK)
	5W-7644 B	[2]	SHIM (4-MM THK)
	5W-7642 B	[2]	SHIM (5-MM THK)
	5W-7641 B	[2]	SHIM (5.5-MM THK)
	5W-7643 B	[2]	SHIM (4.5-MM THK)
	128-1733 B	[2]	SHIM (2-MM THK)
	128-1734 B	[2]	SHIM (3-MM THK)
	5W-6408 B	[2]	WASHER (18.5X35X8-MM THK)
	202-8145 B	[2]	WASHER (18.5X35X9-MM THK)
	202-8146 B	[2]	WASHER (18.5X35X11-MM THK)
	202-8147 B	[2]	WASHER (18.5X35X12-MM THK)
	202-8148 B	[2]	WASHER (18.5X35X13-MM THK)
	202-8149 B	[2]	WASHER (18.5X35X14-MM THK)
8.	204-7841	[2]	RING
9.	121-7687	[2]	SEAL-O-RING
10.	8U-3473	[1]	SEAL-O-RING
11.	8U-5818	[1]	FITTING
12.	5W-5632	[4]	BOLT (M14X2X100-MM)
13.	5W-6442	[1]	HOUSING
14.	5W-5547 B	[1]	DISC (1-MM THK)
	5W-5548 B	[1]	DISC (1.1-MM THK)
	5W-5549 B	[1]	DISC (1.2-MM THK)
	5W-5550 B	[1]	DISC (1.3-MM THK)
	5W-5551 B	[1]	DISC (1.4-MM THK)
	5W-5552 B	[1]	DISC (1.5-MM THK)
	5W-5553 B	[1]	DISC (1.6-MM THK)
	5W-5554 B	[1]	DISC (1.7-MM THK)
	5W-6400 B	[1]	DISC (1.8-MM THK)
	5W-5555 B	[1]	DISC (1.05-MM THK)
	5W-5556 B	[1]	DISC (1.15-MM THK)
	5W-5561 B	[1]	DISC (1.65-MM THK)
	8U-2752 B	[1]	DISC (0.7-MM THK)
	8U-2753 B	[1]	DISC (0.8-MM THK)
	8U-2754 B	[1]	DISC (0.9-MM THK)
15.	5W-6391	[2]	SCRAPER
16.	7T-9342	[1]	CONE-BEARING
17.	9R-6932 B	[1]	RING (11.3-MM THK)
	9R-6933 B	[1]	RING (11.33-MM THK)
	9R-6934 B	[1]	RING (11.36-MM THK)
	9R-6935 B	[1]	RING (11.39-MM THK)
	9R-6936 B	[1]	RING (11.42-MM THK)
	9R-6937 B	[1]	RING (11.45-MM THK)
	9R-6938 B	[1]	RING (11.48-MM THK)
	9R-6939 B	[1]	RING (11.51-MM THK)
	9R-6940 B	[1]	RING (11.54-MM THK)
	9R-6941 B	[1]	RING (11.57-MM THK)
	9R-6942 B	[1]	RING (11.6-MM THK)
	9R-6943 B	[1]	RING (11.63-MM THK)
	9R-6944 B	[1]	RING (11.66-MM THK)
	9R-6945 B	[1]	RING (11.69-MM THK)
	9R-6836 B	[1]	RING (11.72-MM THK)
	9R-6837 B	[1]	RING (11.75-MM THK)
	9R-6838 B	[1]	RING (11.78-MM THK)
	9R-6839 B	[1]	RING (11.81-MM THK)
	9R-6840 B	[1]	RING (11.84-MM THK)
	9R-6841 B	[1]	RING (11.87-MM THK)
	9R-6842 B	[1]	RING (11.9-MM THK)
	9R-6843 B	[1]	RING (11.93-MM THK)
	9R-6844 B	[1]	RING (11.96-MM THK)
	9R-6845 B	[1]	RING (11.99-MM THK)
	9R-6846 B	[1]	RING (12.02-MM THK)
	9R-6847 B	[1]	RING (12.05-MM THK)
	9R-6848 B	[1]	RING (12.08-MM THK)
	9R-6849 B	[1]	RING (12.11-MM THK)
	9R-6850 B	[1]	RING (12.14-MM THK)
	9R-6924 B	[1]	RING (12.17-MM THK)
	9R-6925 B	[1]	RING (12.2-MM THK)
	9R-6926 B	[1]	RING (12.23-MM THK)
	9R-6927 B	[1]	RING (12.26-MM THK)
	9R-6928 B	[1]	RING (12.29-MM THK)
	9R-6929 B	[1]	RING (12.32-MM THK)
	9R-6930 B	[1]	RING (12.35-MM THK)
	9R-6931 B	[1]	RING (12.38-MM THK)
	8U-5669 B	[1]	SPACER (11.27-MM THK)
	8U-5670 B	[1]	SPACER (11.24-MM THK)
	8U-5671 B	[1]	SPACER (11.21-MM THK)
	8U-5672 B	[1]	SPACER (11.18-MM THK)
	8U-5673 B	[1]	SPACER (11.15-MM THK)
	128-7637 B	[1]	RING (11.12-MM THK)
	128-7638 B	[1]	RING (11.09-MM THK)
	128-7639 B	[1]	RING (11.06-MM THK)
	128-7640 B	[1]	RING (11.03-MM THK)
	128-7641 B	[1]	RING (11-MM THK)
	128-7642 B	[1]	RING (10.97-MM THK)
	128-7643 B	[1]	RING (10.94-MM THK)
18.	5W-5646	[1]	SEAL
19.	203-0215	[3]	SEAL-O-RING
20.	9R-6819	[12]	WASHER (13X21.9X3-MM THK)
21.	216-0590	[1]	ROD AS
22.	5W-6076	[1]	BOLT
23.	5W-5630	[1]	PLUG
24.	6V-5225	[4]	SCREW-DRIVE
25.	5W-5531	[16]	WASHER (19X30X3-MM THK)
26.	5W-6392	[2]	SEAL-O-RING
27.	5W-5483	[2]	RING
28.	5W-5485	[1]	SEAL-O-RING
29.	5W-6643	[1]	GUIDE
30.	5W-4819	[2]	SEAL-O-RING
31.	5W-5696	[1]	CYLINDER (STEERING)
32.	6T-6408	[2]	SEAL-O-RING
33.	9W-4926	[2]	PLUG
34.	9X-0642	[20]	NUT
35.	5W-5694	[20]	RING
36.	9X-0641	[20]	WASHER
37.	054-7758	[20]	STUD
38.	5W-2177 M	[4]	BOLT-SOCKET HEAD (M12X1.75X20-MM)
39.	121-7626	[2]	PLUG
40.	054-6552 B	[2]	SHIM (1.5-MM THK)
	054-6553 B	[2]	SHIM (2-MM THK)
	054-6554 B	[2]	SHIM (2.5-MM THK)
	054-6555 B	[2]	SHIM (3-MM THK)
	054-6556 B	[2]	SHIM (1.7-MM THK)
	054-6557 B	[2]	SHIM (2.2-MM THK)
	8U-2751 B	[2]	WASHER-THRUST
41.	8T-2355	[8]	RING-RETAINING
42.	9R-6949	[16]	RING
43.	121-7627	[8]	BEARING-ROLLER
44.	9R-6950	[8]	PINION-PLANETARY
45.	121-7628	[2]	HOUSING-DRIVE
46.	5W-6370	[2]	RING-RETAINING
47.	9R-6958	[2]	RING-RETAINING
48.	219-4548	[2]	GEAR-CARRIER (35-TEETH)
49.	219-4549	[2]	GEAR-SUN
50.	8U-0746	[2]	WASHER-THRUST
51.	121-7631	[2]	RING-RETAINING
52.	132-3693	[2]	WASHER
53.	121-7632	[8]	DISC-FRICTION
54.	121-7635 B	[10]	DISC-GEAR (2-MM THK)
	121-7634 B	[10]	DISC-GEAR (2.5-MM THK)
	121-7633 B	[10]	DISC-GEAR (3-MM THK)
55.	8U-3591	[12]	SPACER (6.5X15X7-MM THK)
56.	121-7636 M	[12]	BOLT (M6X1X40-MM)
57.	8U-3594	[12]	NUT
58.	8U-3592	[12]	SPRING
59.	9R-7002	[1]	BEARING-TAPERED ROLLER
60.	9R-6997	[1]	SEAL
61.	5W-5666	[1]	FLANGE
62.	9R-6954	[1]	PLATE-COVER
63.	9R-6985	[1]	WASHER (27.1X50X5-MM THK)
64.	5W-5352 M	[1]	NUT (M27X1.5-THD)
65.	5W-5398	[1]	WASHER-RETAINING
66.	5W-5669	[1]	HOUSING
67.	5W-6884	[2]	GEAR
68.	6T-5749	[2]	WASHER-THRUST
69.	5W-5671	[4]	GEAR-PINION
70.	6T-5751	[4]	WASHER-THRUST
71.	6T-5748	[2]	SHAFT-DIFFERENTIAL
72.	8T-2323 M	[12]	BOLT-SOCKET HEAD (M12X1.5X120-MM)
73.	121-7676	[2]	SHAFT-AXLE
74.	8T-2450	[4]	PIN-SPRING
75.	9R-6962	[4]	PIN-CLAMPING
76.	121-7681	[1]	HOUSING-AXLE
77.	121-7682	[1]	HOUSING-AXLE
78.	054-6514 B	[2]	SHIM (0.1-MM THK)
	121-7679 B	[2]	SHIM (0.15-MM THK)
	054-6513 B	[2]	SHIM (0.2-MM THK)
	121-7680 B	[2]	SHIM (0.25-MM THK)
	054-6512 B	[2]	SHIM (0.3-MM THK)
	128-7675 B	[2]	SHIM (0.35-MM THK)
	7T-0564 B	[2]	SHIM (0.4-MM THK)
	121-7677 B	[2]	SHIM (0.45-MM THK)
	7T-0563 B	[2]	SHIM (0.5-MM THK)
	121-7678 B	[2]	SHIM (0.55-MM THK)
	7T-0562 B	[2]	SHIM (0.6-MM THK)
	128-7676 B	[2]	SHIM (0.65-MM THK)
	128-7677 B	[2]	SHIM (0.7-MM THK)
	128-7680 B	[2]	SHIM (0.75-MM THK)
	7T-0561 B	[2]	SHIM (0.8-MM THK)
	128-7681 B	[2]	SHIM (0.85-MM THK)
	128-7683 B	[2]	SHIM (0.9-MM THK)
	128-7684 B	[2]	SHIM (0.95-MM THK)
	7T-0560 B	[2]	SHIM (1-MM THK)
	128-7685 B	[2]	SHIM (1.05-MM THK)
	128-7686 B	[2]	SHIM (1.1-MM THK)
	128-7687 B	[2]	SHIM (1.15-MM THK)
	128-7688 B	[2]	SHIM (1.25-MM THK)
	128-7689 B	[2]	SHIM (1.3-MM THK)
	128-7690 B	[2]	SHIM (1.35-MM THK)
	7T-0558 B	[2]	SHIM (1.4-MM THK)
	128-7691 B	[2]	SHIM (1.45-MM THK)
	128-7692 B	[2]	SHIM (1.5-MM THK)
	128-7693 B	[2]	SHIM (1.55-MM THK)
	128-7694 B	[2]	SHIM (1.6-MM THK)
	128-7695 B	[2]	SHIM (1.65-MM THK)
	7T-0552 B	[2]	SHIM (2-MM THK)
	202-8137 B	[2]	SHIM (1.47-MM THK)
	202-8138 B	[2]	SHIM (1.63-MM THK)
	202-8139 B	[2]	SHIM (1.75-MM THK)
	202-8140 B	[2]	SHIM (1.7-MM THK)
	202-8141 B	[2]	SHIM (1.8-MM THK)
	202-8142 B	[2]	SHIM (1.85-MM THK)
	202-8143 B	[2]	SHIM (1.9-MM THK)
	202-8144 B	[2]	SHIM (1.95-MM THK)
79.	8U-5698	[2]	PLATE-WASHER
80.	121-7637	[2]	RING-BACKUP
81.	121-7638	[2]	RING
82.	121-7639	[4]	RING
83.	121-7640	[2]	PISTON-BRAKE
84.	223-7967	[2]	GEAR
85.	5W-7320	[2]	RING
87.	5W-5480	[4]	SEAL-O-RING
88.	5W-6845	[2]	SEAL-O-RING
89.	8U-5722	[2]	FLANGE
90.	2S-0479	[2]	CONE-BEARING (TAPERED ROLLER)
91.	8U-0747 B	[2]	SPACER (109.7X120.3X15.2-MM THK)
	8U-0748 B	[2]	SPACER (109.7X120.3X15-MM THK)
	8U-0749 B	[2]	SPACER (109.7X120.3X14.8-MM THK)
	8U-0750 B	[2]	SPACER (109.7X120.3X14.6-MM THK)
	8U-0751 B	[2]	SPACER (109.7X120.3X14.4-MM THK)
	8U-0752 B	[2]	SPACER (109.7X120.3X14.2-MM THK)
	8U-0753 B	[2]	SPACER (109.7X120.3X14-MM THK)
	121-7642 B	[2]	SPACER (109.7X120.3X14.42-MM THK)
	121-7643 B	[2]	SPACER (109.7X120.3X14.45-MM THK)
	121-7644 B	[2]	SPACER (109.7X120.3X14.48-MM THK)
	121-7645 B	[2]	SPACER (109.7X120.3X14.51-MM THK)
	121-7646 B	[2]	SPACER (109.7X120.3X14.54-MM THK)
92.	2S-0480	[4]	CUP-TAPERED ROLLER
93.	6R-5257	[2]	SEAL AS
94.	5W-7640	[2]	SCREW
95.	121-7656	[2]	FITTING
96.	7X-5804	[2]	SEAL-O-RING
97.	5W-5682	[2]	VALVE AS-PURGE (AXLE)
98.	121-7657 Y	[2]	UNIVERSAL JOINT GP
99.	128-7867	[4]	FITTING-HYDRAULIC
100.	8T-4779 M	[16]	BOLT (M16X2X35-MM)
101.	110-0860	[4]	PIN-BEARING
102.	121-7659 B	[2]	SHIM (0.6-MM THK)
	121-7661 B	[2]	SHIM (0.8-MM THK)
	121-7662 B	[2]	SHIM (1-MM THK)
	121-7663 B	[2]	SHIM (1.2-MM THK)
	121-7665 B	[2]	SHIM (1.6-MM THK)
	121-7667 B	[2]	SHIM (2-MM THK)
103.	110-4743	[4]	SEAL-O-RING
104.	110-0858	[4]	CAP-SEALING
105.	4D-8648	[4]	CUP-BEARING
106.	121-7670	[1]	HOUSING GP-AXLE (RH)
	121-7668	[1]	NUT
107.	121-7669	[1]	HOUSING GP-AXLE (LH)
	121-7668	[1]	NUT
108.	164-2658	[1]	TIE ROD GP (RH)
108A.	5W-5374	[1]	ROD AS
108B.	8U-9402	[1]	CLAMP
109.	164-2657	[1]	TIE ROD GP (LH)
109A.	5W-5374	[1]	ROD AS
109B.	8U-9402	[1]	CLAMP
110.	121-7675	[4]	BUSHING
111.	9R-6996	[4]	SEAL
112.	175-4073	[2]	BUSHING-SLEEVE
113.	9R-6948	[4]	CLIP
114.	9R-7003	[1]	BEARING-TAPERED ROLLER
115.	6Y-2942	[1]	BEARING-TAPERED ROLLER
116.	5W-5475	[1]	SEAL-O-RING
117.	5W-5627 M	[16]	BOLT (M18X2.5X60-MM)
118.	178-8608	[2]	CONE-TAPERED
119.	6V-2652	[4]	CONE-BEARING
120.	6Y-2943	[1]	CUP-BEARING (TAPERED ROLLER)
121.	7T-9343	[1]	CUP-BEARING
	B		USE AS REQUIRED
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP24330147

123-9726: AXLE AR-REAR

AXLE AR-REAR

123-9726 AXLE AR-REAR
S/N 6TL1-409
WITH DISC BRAKE
PART OF 123-9723 POWER TRAIN AR

i00554183 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6V-4433	[2]	FITTING
2.	136-8482	[2]	ADAPTER
3.	123-8324	[2]	CAP
4.	Y	[1]	AXLE & TRANSMISSION AR
5.	3J-1907	[2]	SEAL-O-RING
6.	6V-7688 M	[8]	LOCKNUT (M20X2.5-THD)
7.	7Y-1858	[16]	WASHER (21X37X3-MM THK)
8.	8T-0656 M	[8]	BOLT (M20X2.5X150-MM)
9.	8T-7876	[2]	SEAL-O-RING
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP24330148

123-9728: AXLE AR-REAR

AXLE AR-REAR

123-9728 AXLE AR-REAR
S/N 6TL1-409
PART OF 123-9727 AXLE & TRANSMISSION AR

i00516081 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8U-5919	[1]	HOUSING-AXLE
2.	109-4440	[1]	PLUG
3.	110-0847	[1]	PLUG-SCREW
4.	190-8676	[2]	SEAL-O-RING
5.	5W-8311	[2]	ROD-AXLE
6.	9R-3533 M	[13]	BOLT-SPECIAL (M6X1 THD)
7.	6T-6408	[2]	SEAL-O-RING
8.	9R-6949	[16]	RING
9.	8T-0349 M	[36]	BOLT (M16X2X65-MM)
10.	5W-3061	[2]	SEAL-O-RING
11.	8U-0776	[2]	RING-SUPPORT
12.	9R-6816	[1]	STUD (M14X2 THD)
13.	5W-5682	[2]	VALVE AS-PURGE
14.	8U-5923	[2]	FITTING AS
15.	8U-2233	[2]	SEAL-O-RING
16.	4K-2039	[2]	SEAL-O-RING
17.	6R-5257	[2]	SEAL AS
18.	2S-0480	[4]	CUP-TAPERED ROLLER
19.	9R-7000 M	[1]	NUT (M14X2-THD)
20.	8U-0747 B	[2]	SPACER (109.7X120.3X15.2-MM THK)
	8U-0748 B	[2]	SPACER (109.7X120.3X15-MM THK)
	8U-0749 B	[2]	SPACER (109.7X120.3X14.8-MM THK)
	8U-0750 B	[2]	SPACER (109.7X120.3X14.6-MM THK)
	8U-0751 B	[2]	SPACER (109.7X120.3X14.4-MM THK)
	8U-0752 B	[2]	SPACER (109.7X120.3X14.2-MM THK)
	8U-0753 B	[2]	SPACER (109.7X120.3X14-MM THK)
	121-7642 B	[2]	SPACER (109.7X120.3X14.42-MM THK)
	121-7643 B	[2]	SPACER (109.7X120.3X14.45-MM THK)
	121-7644 B	[2]	SPACER (109.7X120.3X14.48-MM THK)
	121-7645 B	[2]	SPACER (109.7X120.3X14.51-MM THK)
	121-7646 B	[2]	SPACER (109.7X120.3X14.54-MM THK)
21.	223-7894	[2]	HUB GP-WHEEL
			(EACH INCLUDES)
22.	211-7104	[1]	NUT (M95X1.5-THD)(M95X1.5-THD)
23.	8U-2343	[4]	PLUG
24.	9W-4926	[2]	PLUG
25.	9X-0642	[20]	NUT
26.	5W-5694	[20]	RING
27.	9X-0641	[20]	WASHER
28.	054-7758	[20]	STUD
29.	5W-2177 M	[4]	BOLT-SOCKET HEAD (M12X1.75X20-MM)
30.	121-7626	[2]	PLUG
31.	203-0215	[2]	SEAL-O-RING
32.	2S-0479	[2]	CONE-BEARING (TAPERED ROLLER)
33.	8U-5722	[2]	FLANGE
34.	5W-6845	[2]	SEAL-O-RING
35.	121-7627	[8]	BEARING-ROLLER
36.	5W-5480	[4]	SEAL-O-RING
37.	8U-3834	[2]	SPACER (95.5X105.55X3.8-MM THK)
38.	5W-7320	[2]	RING
39.	223-7967	[2]	GEAR
40.	121-7640	[2]	PISTON-BRAKE
41.	121-7639	[4]	RING
42.	121-7638	[2]	RING
43.	121-7637	[2]	RING-BACKUP
44.	8U-5698	[2]	PLATE-WASHER
45.	8U-3592	[12]	SPRING
46.	8U-3594	[12]	NUT
47.	121-7636 M	[12]	BOLT (M6X1X40-MM)(M16X1 THD)
48.	8U-3591	[12]	SPACER (6.5X15X7-MM THK)(6.5X15X7-MM THK)
49.	5W-7381	[2]	SHAFT-SEAL
50.	121-7635 B	[10]	DISC-GEAR (2-MM THK)
	121-7634 B	[10]	DISC-GEAR (2.5-MM THK)
	121-7633 B	[10]	DISC-GEAR (3-MM THK)
51.	054-6552 B	[2]	SHIM (1.5-MM THK)
	054-6553 B	[2]	SHIM (2-MM THK)
	054-6554 B	[2]	SHIM (2.5-MM THK)
	054-6555 B	[2]	SHIM (3-MM THK)
	054-6556 B	[2]	SHIM (1.7-MM THK)
	054-6557 B	[2]	SHIM (2.2-MM THK)
	8U-2751 B	[2]	WASHER-THRUST
52.	8T-2355	[8]	RING-RETAINING
53.	121-7632	[8]	DISC-FRICTION
54.	132-3693	[2]	WASHER (130X182.6X14.5-MM THK)
55.	121-7631	[2]	RING-RETAINING
56.	8U-0746	[2]	WASHER-THRUST
57.	129-2712	[2]	GEAR-SUN
58.	8T-9524	[2]	SEAL-O-RING
59.	132-4344	[2]	CARRIER
60.	5W-6370	[2]	RING-RETAINING
61.	121-7628	[2]	HOUSING-DRIVE
62.	9R-6950	[8]	PINION-PLANETARY
63.	178-8608	[2]	CONE-TAPERED
	B		USE AS REQUIRED
	M		METRIC PART

#SEBP24330149

131-3112: AXLE AR-REAR

AXLE AR-REAR

131-3112 AXLE AR-REAR
S/N 6TL1-389; 6TL391-391; 6TL393-393
PART OF 131-2904 AXLE & TRANSMISSION AR
AN ATTACHMENT

i00508472 SEBP2433

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	129-2702	[1]	HOUSING-AXLE
2.	109-4440	[1]	PLUG
3.	110-0847	[1]	PLUG-SCREW
4.	9R-6953	[2]	SEAL-O-RING
5.	129-2703	[2]	SHAFT
6.	9R-3533 M	[13]	BOLT-SPECIAL
7.	129-2704	[2]	SLEEVE
8.	129-2705	[2]	RING-RETAINING
9.	132-5160	[2]	GEAR AS
			(EACH INCLUDES)
10.	9R-6957	[1]	NUT
11.	8T-2393 M	[6]	BOLT-SOCKET HEAD (M16X2X60-MM)
12.	5W-3061	[2]	SEAL-O-RING
13.	8U-0776	[2]	RING-SUPPORT
14.	6R-5257	[2]	SEAL AS
15.	2S-0480	[4]	CUP-TAPERED ROLLER
16.	6V-0832	[4]	CONE
17.	8U-0747 B	[2]	SPACER (109.7X120.3X15.2-MM THK)
	8U-0748 B	[2]	SPACER (109.7X120.3X15-MM THK)
	8U-0749 B	[2]	SPACER (109.7X120.3X14.8-MM THK)
	8U-0750 B	[2]	SPACER (109.7X120.3X14.6-MM THK)
	8U-0751 B	[2]	SPACER (109.7X120.3X14.4-MM THK)
	8U-0752 B	[2]	SPACER (109.7X120.3X14.2-MM THK)
	8U-0753 B	[2]	SPACER (109.7X120.3X14-MM THK)
	121-7642 B	[2]	SPACER (109.7X120.3X14.42-MM THK)
	121-7643 B	[2]	SPACER (109.7X120.3X14.45-MM THK)
	121-7644 B	[2]	SPACER (109.7X120.3X14.48-MM THK)
	121-7645 B	[2]	SPACER (109.7X120.3X14.51-MM THK)
	121-7646 B	[2]	SPACER (109.7X120.3X14.54-MM THK)
18.	129-2721 Y	[2]	BRAKE GP-DRUM
19.	129-2720	[2]	DRUM-BRAKE
20.	9X-0642	[20]	NUT
21.	5W-5694	[20]	RING
22.	9X-0641	[20]	WASHER
23.	129-2718	[20]	STUD-WHEEL
24.	5W-2177 M	[4]	BOLT-SOCKET HEAD (M12X1.75X20-MM)
25.	3T-8699	[2]	PLUG
26.	6T-6403	[2]	SEAL-O-RING
27.	054-6552 B	[2]	SHIM (1.5-MM THK)
	054-6553 B	[2]	SHIM (2-MM THK)
	054-6554 B	[2]	SHIM (2.5-MM THK)
	054-6555 B	[2]	SHIM (3-MM THK)
	129-2714 B	[2]	SHIM (3.5-MM THK)
	129-2715 B	[2]	SHIM (4-MM)
	129-2716 B	[2]	SHIM (4.5-MM THK)
	129-2717 B	[2]	SHIM (5-MM THK)
28.	8T-2355	[8]	RING-RETAINING
29.	132-5158	[2]	FLANGE
30.	5W-6845	[2]	SEAL-O-RING
31.	129-2710	[2]	GEAR-INTERNAL
32.	9R-6973	[2]	PLATE-LOCK
33.	129-2711	[4]	BOLT (M10X1.5X16-MM)
34.	129-2712	[2]	GEAR-SUN
35.	129-2713	[2]	HOUSING-DRIVE
36.	9R-6950	[8]	PINION-PLANETARY
37.	121-7627	[8]	BEARING-ROLLER
38.	9R-6949	[16]	RING
39.	8T-1447 M	[30]	BOLT-SOCKET HEAD (M16X2X70-MM)
40.	9R-6816	[1]	STUD
41.	9R-7000 M	[1]	NUT (M14X2-THD)
	B		USE AS REQUIRED
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

Information:

ELECTRICAL AND STARTING SYSTEM

WIRING GP

Engine News

270-5051 Repair Kit (Electrical Connectors) Available for Repairs to Wiring Harnesses with Ampseal 16 and A4E 2 Connectors {0709, 1408}
2006/03/20

Bulk Wiring Harnesses Are Available for Use with Caterpillar Products {1408}
2010/05/13

Special Instruction

Cross-Reference for Electrical Connectors {7553}
Cross-Reference for Electrical Connectors {7553}

Circuit Breaker Harness Assembly {1420}
Circuit Breaker Harness Assembly {1420}

Service Of Machined Terminals And Service of Stamped and Formed Terminals{7553}
Service Of Machined Terminals And Service of Stamped and Formed Terminals{7553}

Installation and Operation of the Exhaust Monitor Used in All Diesel Particulate Filter (DPF) Retrofit Emissions Applications{1091, 1408, 7490, 7498}
Installation and Operation of the Exhaust Monitor Used in All Diesel Particulate Filter (DPF) Retrofit Emissions Applications{1091, 1408, 7490, 7498}

Tool Operating Manual

Using the 362-3555 Connector Repair Kit to Service Harnesses with Ampseal 16 Connectors{0685, 1408}
Using the 362-3555 Connector Repair Kit to Service Harnesses with Ampseal 16 Connectors{0685, 1408}

Using the U5MK1110 Ampseal Connector Kit for Wiring Harness Repairs on Perkins Engines{7553}
Using the U5MK1110 Ampseal Connector Kit for Wiring Harness Repairs on Perkins Engines{7553}

Using the U5MK1110 Ampseal Connector Kit for Wiring Harness Repairs on Perkins Engines{0374, 0599, 0701, 0709}
Using the U5MK1110 Ampseal Connector Kit for Wiring Harness Repairs on Perkins Engines{0374, 0599, 0701, 0709}

Using the 453-3204 Pressure and Temperature Test Group{0374, 0599, 0706, 0708, 0709, 0731, 0732, 0738, 1408, 1439}
Using the 453-3204 Pressure and Temperature Test Group{0374, 0599, 0706, 0708, 0709, 0731, 0732, 0738, 1408, 1439}

Reuse And Salvage Guidelines

Guideline for Visual Inspection and Repair of Foam Wiring Harness {0649, 1408, 1408, 1408, 1408}
Guideline for Visual Inspection and Repair of Foam Wiring Harness {0649, 1408, 1408, 1408, 1408}

Testing and Adjusting

Electric Starting System - Test
3054 Engine

Service Magazine

Dielectric Grease Should Not Be Used in Electrical Connectors {1408, 7553}
2012/05/04

Service of the Machined Terminals and the Stamped and Formed Terminals {7553}
2006/11/13

Updated Instruction For The Bypass Harness {0785, 1408}
2008/03/17

Bulk Wiring Harnesses Are Available for Use with Caterpillar Products {1408}
2010/05/12

Striped Wire Is Replaced With Improved Ink Jet Identification for Legacy (Parts Service) Wire harnesses {1408}
2012/06/08

Use Conductive Fasteners for Electrical Grounding on All Cat Products {7553, 7556}
2012/05/08

Information On Battery Cables and Wire Assemblies for Assembling at Dealer Site {4459}
2012/09/21

Caterpillar Parts SIS Catalog M312 :

141-3995 WIRING GP-PRIORITY VALVE

123-9719 WIRING GP-PLATFORM

123-9715 WIRING GP-MACHINE

137-9413 WIRING GP-CONTROL

121-2452 WIRING GP-UNDERCARRIAGE/SWIVEL

124-2920 AXLE & MTG AR-FRONT

131-3110 AXLE & MTG AR-REAR

123-9727 AXLE & TRANSMISSION AR

131-2904 AXLE & TRANSMISSION AR

124-2921 AXLE AR-FRONT

123-9726 AXLE AR-REAR

123-9728 AXLE AR-REAR

Truck sale:

24,412

Caterpillar M312, Construction
- wheel excavator
BERGERAT MONNOYEUR SP. Z O.O.
Poland

$24,298 USD

CATERPILLAR M312 1999
- WHEEL EXCAVATORS
BERGERAT MONNOYEUR POLAND
K. Kolumba 15 - Komorniki -

$15,899 USD

CATERPILLAR M312 2002
- WHEEL EXCAVATORS
BERGERAT MONNOYEUR POLAND
K. Kolumba 15 - Komorniki -

USD $24,599

1999 CAT M312

Budrolpol

USD $46,900

2001 CAT M312

MB Tractor & Equipment
Tilton, New Hampshire