8U-0966 FITTING GP-HYDRAULIC -QUICK DISCONNECT S/N 6TL410-UP PART OF 137-2581 LINES GP-DIVERTER VALVE, 137-2640 LINES GP-STICK Type 2 AN ATTACHMENT M312

HYDRAULIC SYSTEM

FITTING GP

0. 8U-0966 FITTING GP

TANK GP

1. 125-3024 GAUGE GP-S

MOTOR GP

2. 190-8123 HEAD GP-MO

PUMP GP

3. 136-7781 HEAD GP-PU
4. 136-7781 HEAD GP-PU
5. 136-7781 HEAD GP-PU

DRIVE GP

6. 125-4181 HOUSING GP

HYDRAULIC GP

7. 123-9731 HYDRAULIC
8. 123-9733 HYDRAULIC

COVER GP

9. 221-6815 KIT-PUMP C
0. INFORMATION

EXCAVATOR M312 EXCAVATOR 6TL
M312 Excavator 6TL00410-UP (MACHINE) POWERED BY 3054 Engine SEBP2851 M312 6TL (1988)

HYDRAULIC SYSTEM

FITTING GP

125-5387 FITTING GP-HYDRAULIC

125-5388 FITTING GP-HYDRAULIC

163-4210 FITTING GP-HYDRAULIC

176-6765 FITTING GP-HYDRAULIC

188-7655 FITTING GP-HYDRAULIC

8U-0966 FITTING GP-HYDRAULIC

#SEBP28510370

8U-0966: FITTING GP-HYDRAULIC

FITTING GP-HYDRAULIC

8U-0966 FITTING GP-HYDRAULIC -QUICK DISCONNECT
S/N 6TL410-UP
PART OF 137-2581 LINES GP-DIVERTER VALVE, 137-2640 LINES GP-STICK
Type 2
AN ATTACHMENT

i01513315 SEBP2851

8U0966 FITTING GP-HYDRAULIC Parts scheme

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	193-4726	[1]	SEAL-O-RING
2.	096-6100	[1]	SEAL-O-RING
3.	193-4727	[1]	RING-BACKUP

#SEBP28510371

125-3024: GAUGE GP-SIGHT

GAUGE GP-SIGHT

125-3024 GAUGE GP-SIGHT
S/N 6TL410-UP
PART OF 117-8010 TANK & MTG GP-HYDRAULIC

i00521322 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	120-6366	[2]	STOP
2.	8F-9206	[2]	SEAL-O-RING
3.	120-6367	[2]	SEAL-O-RING
4.	133-1364	[1]	PLATE
5.	120-6369	[1]	GLASS
6.	120-6370	[1]	HOUSING
7.	120-6371	[2]	SCREW
8.	120-6372	[2]	RING-BACKUP
9.	120-6373 M	[2]	NUT
	M		METRIC PART

#SEBP28510372

190-8123: HEAD GP-MOTOR

HEAD GP-MOTOR

190-8123 HEAD GP-MOTOR
S/N 6TL1140-UP
PART OF 175-6565 MOTOR GP-PISTON

i01309508 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	190-8653 Y	[1]	VALVE GP-MOTOR CONTROL
2.	190-8654 Y	[1]	VALVE GP-MOTOR CONTROL
3.	190-8659	[1]	HEAD
4.	373-8440	[1]	PISTON
5.	124-9941	[1]	TRUNNION
6.	343-9781	[1]	PISTON
7.	373-8439	[1]	PIN-THREADED
8.	6V-8200 M	[4]	BOLT-SOCKET HEAD (M12X1.75X35-MM)
9.	7X-2436 M	[4]	BOLT (M12X1.75X100-MM)
10.	9X-7680	[8]	SEAL-O-RING
11.	123-4953 M	[1]	BOLT-SOCKET HEAD (M12X1.75X25-MM)
13.	9X-6419	[2]	DOWEL
14.	120-4394	[1]	PLUG-BREAK OFF
15.	123-2017 M	[1]	PLUG-BREAK OFF
16.	123-5800	[2]	PLUG AS
17.	190-8657	[2]	VALVE GP-RELIEF (CROSSOVER, MAKEUP)
			(EACH INCLUDES)
	217-0288	[1]	CAP
	190-8718	[1]	KIT-SEAL (RELIEF VALVE)
			(INCLUDES SEALS & RINGS)
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP28510373

136-7781: HEAD GP-PUMP

HEAD GP-PUMP

136-7781 HEAD GP-PUMP
S/N 6TL410-UP
PART OF 139-9532 PUMP GP-SWING
Type 1

i00595980 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	126-5674 Y	[2]	VALVE GP-RELIEF
2.	112-4634 Y	[1]	VALVE GP-RELIEF
3.	126-5675 Y	[1]	VALVE GP-RELIEF
4.	126-5676	[1]	BUSHING
5.	126-5677	[1]	BUSHING
6.	126-5678	[1]	BUSHING
7.	108-3819 M	[4]	BOLT-SOCKET HEAD (M12X1.75X70-MM)
8.	5W-7487	[2]	DOWEL
9.	7J-6285 J	[1]	SEAL-O-RING
10.	087-4772 J	[3]	PLUG-O-RING
11.	6V-8397 J	[2]	SEAL-O-RING
12.	112-4628	[2]	SCREW (7/16-20X0.5-IN)

			AVAILABLE REPAIR KIT(S):
	126-5679 J	[1]	KIT-SEAL
	J		KIT(S) MARKED J INCLUDES PART(S) MARKED J
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP28510374

136-7781: HEAD GP-PUMP

HEAD GP-PUMP

136-7781 HEAD GP-PUMP
S/N 6TL410-UP
PART OF 139-9532 PUMP GP-SWING
Type 2

i01168993 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	126-5674 Y	[2]	VALVE GP-RELIEF (CROSSOVER)
2.	177-7122 CY	[1]	VALVE GP-RELIEF (CHARGE PRESSURE)
3.	126-5675 Y	[1]	VALVE GP-RELIEF (STEERING HIGH PRESSURE CUTOFF)
4.	126-5676	[1]	BUSHING
5.	126-5677	[1]	BUSHING
6.	126-5678	[1]	BUSHING
7.	108-3819 M	[4]	BOLT-SOCKET HEAD (M12X1.75X70-MM)
8.	5W-7487	[2]	DOWEL
9.	7J-6285 J	[1]	SEAL-O-RING
10.	087-4772 J	[3]	PLUG-O-RING
11.	6V-8397 J	[2]	SEAL-O-RING
12.	112-4628	[2]	SCREW (7/16-20X0.5-IN)

			AVAILABLE REPAIR KIT(S):
	126-5679 J	[1]	KIT-SEAL (PUMP HEAD)
	C		CHANGE FROM PREVIOUS TYPE
	J		KIT MARKED J SERVICES PART(S) MARKED J
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP28510375

136-7781: HEAD GP-PUMP

HEAD GP-PUMP

136-7781 HEAD GP-PUMP
S/N 6TL410-UP
PART OF 139-9532 PUMP GP-SWING
Type 3

i04246053 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	126-5674 Y	[2]	VALVE GP-RELIEF (CROSSOVER)
2.	212-6679 CY	[1]	VALVE GP-RELIEF (CHARGE PRESSURE)
3.	126-5675 Y	[1]	VALVE GP-RELIEF (STEERING HIGH PRESSURE CUTOFF)
4.	126-5676	[1]	BUSHING
5.	126-5677	[1]	BUSHING
6.	126-5678	[1]	BUSHING
7.	108-3819 M	[4]	BOLT-SOCKET HEAD (M12X1.75X70-MM)
8.	5W-7487	[2]	DOWEL
9.	351-1768 C	[1]	SEAL-O-RING
10.	087-4772	[3]	PLUG-O-RING
11.	6V-8397	[2]	SEAL-O-RING
12.	112-4628	[2]	SCREW (7/16-20X0.5-IN)
13.	120-4394 C	[3]	PLUG-BREAK OFF
14.	123-2017 CM	[1]	PLUG-BREAK OFF

			PARTS SHOWN IN GRAPHIC(S) WITHOUT A REFERENCE NUMBER ARE NOT SERVICED SEPARATELY

			AVAILABLE REPAIR KIT(S):
	425-9067	[1]	KIT-PUMP (PUMP HEAD)
			(INCLUDES O-RING SEALS, COLLAR NUTS, SPACERS & SEAL RING)
	C		CHANGE FROM PREVIOUS TYPE
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP28510376

125-4181: HOUSING GP-SWING

HOUSING GP-SWING

125-4181 HOUSING GP-SWING
S/N 6TL410-1033
PART OF 120-4712 DRIVE GP-SWING

i00521832 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	125-4220	[1]	SHAFT
2.	125-4222	[1]	WASHER
3.	125-4223	[1]	RING
4.	8U-2520	[1]	BEARING
5.	125-4225	[1]	HOUSING
6.	5W-7412	[1]	MAGNET
7.	125-4226	[1]	RING
8.	125-4227	[1]	BEARING
9.	125-4228	[1]	RING
10.	125-4230	[1]	NUT

#SEBP28510377

123-9731: HYDRAULIC AR

HYDRAULIC AR

123-9731 HYDRAULIC AR
S/N 6TL410-UP
PART OF 117-7934 GENERAL AR

i00697372 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name
120-0306 Y	[1]	CYLINDER & MTG GP-AXLE LOCK
151-4787 Y	[1]	LINES GP-OSC LOCK & XMSN SHIFT
148-2163 Y	[1]	LINES GP-STABILIZER & BLADE
151-2836 Y	[1]	LINES GP-STEER, BRAKE & TRAVEL
126-6758 Y	[1]	SWIVEL & MOUNTING GP
Y		SEPARATE ILLUSTRATION

#SEBP28510378

123-9733: HYDRAULIC AR-UPPER

HYDRAULIC AR-UPPER

123-9733 HYDRAULIC AR-UPPER
S/N 6TL410-UP
PART OF 117-7934 GENERAL AR

i01045701 SEBP2851

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Parts for your M312 EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name

123-9735 Y	[1]	COUPLING GP-PUMP
148-2159 Y	[1]	LINES GP-FRONT
148-2161 Y	[1]	LINES GP-IMPLEMENT & TRAVEL
148-2310 Y	[1]	LINES GP-LOAD CONTROL VALVE (BOOM)
146-5551 Y	[1]	LINES GP-PILOT
148-2166 Y	[1]	LINES GP-PILOT (AUXILIARY SYSTEM)
148-2168 Y	[1]	LINES GP-PILOT
Y	[1]	LINES GP-PILOT
145-9909 Y	[1]	LINES GP-PRESSURE TEST
153-0285 Y	[1]	LINES GP-PUMP
150-3185 Y	[1]	LINES GP-RETURN
148-2167 Y	[1]	LINES GP-STEERING
148-2170 Y	[1]	LINES GP-SWING MOTOR
117-8023 Y	[1]	PUMP & MTG GP-MAIN HYDRAULIC
117-8030 Y	[1]	PUMP & MTG GP-STEERING & BRAKE
117-8010 Y	[1]	TANK & MTG GP-HYDRAULIC
123-8817 Y	[1]	VALVE & MTG GP-MAIN CONTROL
Y		SEPARATE ILLUSTRATION