1U2778 PISTON MOTOR GROUP-LINK-PART 1. SERIAL NO. 64R1284 TO 64R1480 INCL. ALSO PART OF 8K2631 SWING MOTOR LINES GROUP SHOWN ON PAGE 161B. NOTE: TWO REQUIRED FOR PROPELLING TRACK & ONE REQUIRED FOR ACTUATING SWING 235

HYDRAULIC SYSTEM

MOTOR GP

0. 1U-2778 MOTOR GP-P
1. 1U-2778 MOTOR GP-P
2. 4T-3068 MOTOR GP-P
3. 4T-3068 MOTOR GP-P

VALVE GP-SHUTTLE

4. 3G-3253 VALVE GP-S

VALVE GP-COMBINER & RELIEF

5. 8J-8921 COMBINER &

VALVE GP-SHUTTLE

6. 4T-3056 VALVE GP-S

VALVE GP-RELIEF

7. 8J-9357 VALVE GP-R

LINES GP-TRAVEL MOTOR

8. 3V-4888 LINES GP-T
9. 3V-4888 LINES GP-T
0. INFORMATION

EXCAVATOR 235 EXCAVATOR 64R
235 EXCAVATOR 64R01258-UP (MACHINE) POWERED BY 3306 ENGINE HEBP1321 235 64R (1977)

HYDRAULIC SYSTEM

MOTOR GP

3V-4906 GUARD GP-TRACK MOTOR

3G-3843 MOTOR GP-PISTON-LINK

1U-2778 MOTOR GP-PISTON

4T-3068 MOTOR GP-PISTON

#HEBP13210470

1U-2778: MOTOR GP-PISTON

MOTOR GP-PISTON

1U2778 PISTON MOTOR GROUP-LINK-PART 1. SERIAL NO. 64R1284 TO 64R1480 INCL.
ALSO PART OF 8K2631 SWING MOTOR LINES GROUP SHOWN ON PAGE 161B. NOTE:
TWO REQUIRED FOR PROPELLING TRACK & ONE REQUIRED FOR ACTUATING SWING

c231490 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6J-7854	[1]	RING
2.	8J-6244	[1]	RACE & ROLLER ASSEM. (outer)
	8J-6243	[1]	RACE (inner)
3.	6J-7855	[2]	RING
4.	8J-6274	[1]	RING
5.	6J-7846	[3]	RACE
6.	3G-9680	[1]	SHAFT
7.	5H-6005	[3]	SEAL
8.	0S-1618	[2]	BOLT
9.	0S-1566	[1]	BOLT
	8J-6236	[1]	LOCK
10.	3G-2629	[1]	RETAINER
11.	9J-5716	[1]	TUBE
	8J-0438	[1]	SPRING
12.	9D-8042	[1]	SEAL
13.	3G-4530	[1]	SPRING
14.	3S-6867	[1]	BEARING
15.	9J-8052	[1]	RETAINER
16.	3G-5827	[9]	PISTON ASSEM.
			(Each Includes)
17.	8J-6276	[1]	RETAINER
18.	6J-7836	[1]	RING
19.	9J-8051	[1]	RETAINER
20.	1U-2035	[1]	BARREL ASSEM.
21.	1J-2176	[1]	SEAL
22.	8J-6273	[9]	RING
23.	3F-5792	[1]	SEAL
24.	5H-3182	[1]	PIN
25.	3G-4605	[1]	JOINT ASSEM.
			(Includes)
	2R-1256	[2]	RING
26.	8J-6277 H	[1]	SHIM 1.245 mm(.049 in.) thick
	8J-6278 H	[5]	SHIM .0762 mm(.003 in.) thick
	8J-6279 H	[5]	SHIM .1270 mm(.005 in.) thick
27.	8J-6242	[1]	SEAL
28.	1U-2675	[1]	PLATE
	H		USE AS REQUIRED

#HEBP13210471

1U-2778: MOTOR GP-PISTON

MOTOR GP-PISTON

1U2778 PISTON MOTOR GORUP-LINK-PART 2. SERIAL NO. 64R1284 TO 64R1480 INCL.
ALSO PART OF 8K2631 SWING MOTOR LINES GROUP SHOWN ON PAGE 161B. 3G3253
VALVE PARTS ARE SHOWN ON PAGE 164. NOTE: TWO REQUIRED FOR PROPELLING TRACK
AND ONE REQUIRED FOR ACTUATING SWING

c231491 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-1618	[6]	BOLT
2.	9M-1974	[6]	WASHER
3.	8J-6869	[1]	RETAINER
4.	3G-3098	[1]	BODY
5.	9S-9739	[16]	BOLT 68.5 mm(2.7 in.) long
6.	3G-5755	[1]	PLATE ASSEM.
			(Includes)
	3G-3739	[9]	INSERT
7.	8J-6239	[1]	LOCK
8.	1U-2775	[1]	BODY
9.	9S-8008	[2]	PLUG
	3D-2824	[2]	SEAL
10.	4B-4158	[4]	SCREW
11.	8J-2559	[1]	PLATE (caution)
12.	1U-2777	[1]	HEAD ASSEM.
			(Includes)
13.	8J-6882	[4]	PLUG
14.	1B-9575	[4]	BOLT
15.	3G-3253 Y	[1]	VALVE GROUP
			(Separate Illustration)
16.	7F-8268	[1]	SEAL
17.	5J-5794	[4]	BOLT 88.9 mm(3.5 in.) long
18.	3G-5940	[1]	NUT
19.	9J-0747	[1]	BEARING ASSEM.
20.	1H-5338	[1]	CUP
	2K-5097	[1]	CONE
21.	8B-1312	[2]	DOWEL
	Y		SEPARATE ILLUSTRATION

#HEBP13210472

4T-3068: MOTOR GP-PISTON

MOTOR GP-PISTON

4T3068 PISTON MOTOR GROUP-LINK-PART 1. SERIAL NO. 64R1481-UP
ALSO PART OF 8K2631 SWING MOTOR LINES GROUP SHOWN ON PAGE 161B
4T3056 VALVE PARTS ARE SHOWN ON PAGE 164A. NOTE: TWO REQUIRED FOR
PROPELLING TRACK & ONE REQUIRED FOR ACTUATING SWING

c311376 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2B-2695	[6]	BOLT
2.	9M-1974	[6]	WASHER
3.	4T-1579	[1]	RETAINER
4.	3G-3098	[1]	BODY-LOWER
5.	9S-9739	[16]	BOLT 68.5MM(2.7 IN)LG
6.	3G-5755	[1]	PLATE AS-DRIVE
	3G-3739	[9]	INSERT-BEARING
7.	8J-6239	[1]	LOCK-NUT
8.	1U-2775	[1]	BODY-UPPER
9.	9S-8008	[2]	PLUG-O-RING
	3D-2824	[2]	SEAL-O-RING
10.	4B-4158	[4]	SCREW
11.	8J-2559	[1]	PLATE-CAUTION
12.	4T-3061	[1]	HEAD-MOTOR
13.	8B-1312	[2]	DOWEL
14.	1B-9575	[4]	BOLT
15.	4T-3056 Y	[1]	VALVE GP-SHUTTLE
16.	7F-8268	[1]	SEAL-O-RING
17.	9K-7290	[4]	BOLT-12 POINT HEAD 82.55MM(3.25 IN)LG
18.	3G-5940	[1]	NUT
19.	9J-0747	[1]	BEARING AS
20.	1H-5338	[1]	CUP-ROLLER BEARING
	2K-5097	[1]	CONE-ROLLER BEARING
	Y		SEPARATE ILLUSTRATION

#HEBP13210473

4T-3068: MOTOR GP-PISTON

MOTOR GP-PISTON

4T3068 PISTON MOTOR GROUP-LINK-PART 2. SERIAL NO 64R1481-UP
ALSO PART OF 8K2631 SWING MOTOR LINES GROUP SHOWN ON PAGE 161B
NOTE: TWO REQUIRED FOR PROPELLING TRACK & ONE REQUIRED FOR ACTUATING SWING

c311377 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4T-2676	[1]	RETAINER
2.	1U-1967	[1]	BEARING-ROLLER
3.	035-2297	[1]	RING-RETAINING
4.	4T-2625	[1]	RETAINER
5.	4T-2675	[1]	RACE-THRUST
6.	4T-3059	[1]	SHAFT
7.	5H-6005	[2]	SEAL-O-RING
8.	0S-1618	[2]	BOLT
9.	0S-1566	[1]	BOLT
	8J-6236	[1]	LOCK
10.	4T-3066	[1]	RETAINER
11.	9J-5716	[1]	TUBE
	8J-0438	[1]	SPRING
12.	9D-8042	[1]	SEAL-O-RING
13.	4T-3055	[1]	SPRING
14.	4T-2603	[1]	BEARING-THRUST
15.	4T-2674	[1]	RACE-THRUST
16.	1U-4805 R	[9]	PISTON AS
			(EACH INCLUDES)
17.	8J-6276	[1]	RETAINER
18.	6J-7836	[1]	RING-SNAP
19.	9J-8051	[1]	RETAINER
20.	1U-1965 R	[1]	BARREL AS-CYLINDER
21.	1J-2176	[1]	SEAL-O-RING
22.	8J-6273	[9]	RING-RETAINING
23.	3F-5792	[1]	SEAL-O-RING
24.	5H-3182	[1]	PIN-SPRING
25.	3G-4605	[1]	UNIVERSAL JOINT AS
	2R-1256	[2]	RING-RETAINING
26.	8J-6277 B	[1]	SHIM 1.245MM(.049 IN)THK
	8J-6278 B	[5]	SHIM .0762MM(.003 IN)THK
	8J-6279 B	[5]	SHIM .1270MM(.005 IN)THK
27.	8J-6242	[1]	SEAL-LIP TYPE
28.	4T-3064	[1]	PLATE-PORT
29.	7J-4169	[1]	RING-SNAP
30.	0S-0130	[1]	PIN
	B		USE AS REQUIRED
	R		REMFG PART MAY BE AVAILABLE

#HEBP13210474

3G-3253: VALVE GP-SHUTTLE

VALVE GP-SHUTTLE

3G3253 SHUTTLE VALVE GROUP
PART OF 3G3843 & 1V2778 PISTON MOTOR GROUPS SHOWN ON PAGES 161C & 163

c225373 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3G-3838	[2]	PLUG ASSEM.
			(Each Includes)
2.	9L-9766	[1]	PIN
3.	3J-1907	[2]	SEAL
4.	4B-9783	[2]	BALL
5.	3G-3252	[1]	BODY ASSEM.
6.	3G-3835	[1]	PIN

#HEBP13210475

8J-8921: COMBINER & RELIEF VALVE GP

COMBINER & RELIEF VALVE GP

8J8921 COMBINER & RELIEF VALVE GROUP
PART OF 8K2631 SWING MOTOR LINES GROUP SHOWN ON PAGES 161 & 161B
8J9357 VALVE PARTS ARE SHOWN ON PAGE 165

c203959 HEBP1321

8J8921 COMBINER & RELIEF VALVE GP Parts scheme

For full view, you need register

Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	1J-8960	[2]	SPRING
2.	8J-8908 C	[1]	VALVE GP
3.	9S-8010	[2]	PLUG-O-RING
	2S-4078	[2]	SEAL-O-RING
4.	8J-9357 Y	[1]	VALVE GP-RELIEF
5.	9S-8005	[1]	PLUG-O-RING
	3K-0360	[1]	SEAL-O-RING
	C		CHANGE FROM PREVIOUS TYPE
	Y		SEPARATE ILLUSTRATION

#HEBP13210476

4T-3056: VALVE GP-SHUTTLE

VALVE GP-SHUTTLE

4T3056 SHUTTLE VALVE GROUP. SERIAL NO. 64R1481-UP
PART OF 4T3068 PISTON MOTOR GROUP SHOWN ON PAGE 163A

c303903 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	3G-3838	[2]	PLUG AS
			(EACH INCLUDES)
2.	9L-9766	[1]	PIN-PLUNGER LIFT
3.	3J-1907	[2]	SEAL
4.	4B-9783	[2]	BALL
5.	4T-3057	[1]	BODY AS-VALVE
6.	3G-3835	[1]	PIN

#HEBP13210477

8J-9357: VALVE GP-RELIEF

VALVE GP-RELIEF

8J9357 RELIEF VALVE GROUP
PART OF 8J8921 COMBINER & RELIEF VALVE GROUP SHOWN ON PAGE 164

c226692 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9S-8002	[2]	PLUG-O-RING
	3J-7354	[2]	SEAL-O-RING
2.	5J-2437	[1]	VALVE GP
3.	5J-3237	[1]	STOP
4.	4J-5309	[1]	SEAL-O-RING
5.	4J-0519	[1]	SEAL
6.	5J-0901	[1]	VALVE
7.	5J-0704	[1]	BODY AS
8.	2J-0075	[1]	SPRING
9.	4J-0523	[1]	SEAL-O-RING
10.	3J-3435	[1]	VALVE GP
11.	4J-5573	[1]	SEAL-O-RING
12.	8S-9089 C	[2]	BOLT 114.3MM(4.5IN)LG
	3B-4508	[2]	LOCKWASHER
			-OR-
	1D-4569 C	[2]	BOLT 10.79MM(4.25IN)LG
13.	4J-0522	[1]	SEAL
14.	8F-9206	[1]	SEAL-O-RING
15.	3B-1915	[2]	BOLT 34.93MM(1.375IN)LG
	3B-4506	[2]	LOCKWASHER
			-OR-
	0S-1588 C	[2]	BOLT 31.75MM(1.25IN)LG
16.	5J-4571	[1]	SPRING
17.	5J-2721 C	[5]	SHIM .13MM(.005IN)THK
	C		CHANGE FROM PREVIOUS TYPE

#HEBP13210478

3V-4888: LINES GP-TRACK MOTOR

LINES GP-TRACK MOTOR

3V4888 TRACK MOTOR LINES GROUP-PART 1 OF 3
SERIAL NO. 64R1258 TO 64R1608 INCLUSIVE
1U3884-PAGE 170

c306179 HEBP1321

3V4888 LINES GP-TRACK MOTOR Parts scheme

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	030-7948	[2]	ELBOW
2.	3V-4626	[1]	TUBE ASSEM.
3.	9K-3540	[3]	CLIP
4.	0S-1594	[6]	BOLT
5.	4J-8265	[12]	NUT
6.	5M-2894	[20]	WASHER
7.	8K-3959	[2]	ANGLE
8.	0S-1591	[4]	BOLT
9.	8K-4805	[2]	ANGLE ASSEM.
10.	0S-1588	[4]	BOLT
11.	3B-4506	[4]	LOCKWASHER
12.	8K-1974	[4]	CLAMP
13.	0L-1352	[2]	BOLT
14.	9K-3527	[1]	TUBE ASSEM.
15.	8M-0505	[1]	CONNECTOR
16.	3K-0360	[3]	SEAL
17.	2B-0947	[8]	BOLT
	3B-4508	[8]	LOCKWASHER
18.	3V-4637	[1]	HOSE ASSEM. 146 cm(57.48in.)
19.	1P-3703	[8]	SEAL
20.	2R-6276	[2]	CONNECTOR
	3D-2824	[2]	SEAL
21.	3V-4635	[1]	HOSE ASSEM. 160 cm(62.99 in.)
22.	3V-4627	[1]	TUBE ASSEM.
23.	0T-0768	[32]	BOLT
	5P-8244	[32]	WASHER
24.	3V-4648	[1]	TUBE ASSEM.
25.	1U-3884 CY	[1]	SWIVEL GROUP
			(Separate Illustration)
26.	8K-3843	[1]	PLATE ASSEM.
27.	3V-4636	[1]	HOSE ASSEM. 146 cm(57.48 in.)
28.	1P-5766	[16]	FLANGE
29.	3V-4634	[1]	HOSE ASSEM. 160 cm(62.99 in.)
30.	3V-4647	[1]	TUBE ASSEM.
31.	7J-7187	[1]	CONNECTOR
	4K-1388	[1]	SEAL
32.	9K-3533	[1]	TUBE ASSEM.
33.	9K-3536	[1]	BRACKET ASSEM.
			(Includes)
34.	9F-2978	[2]	NUT
35.	0S-0509	[2]	BOLT
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#HEBP13210479

3V-4888: LINES GP-TRACK MOTOR

LINES GP-TRACK MOTOR

3V4888 TRACK MOTOR LINES GROUP-PART 2 OF 3
SERIAL NO. 64R1258 TO 64R1608 INCLUSIVE
8J2601-PAGE 169

c231486 HEBP1321

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Parts for your 235 EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0T-0319	[8]	BOLT
2.	3B-4507	[2]	LOCKWASHER
3.	3V-5414	[1]	TUBE ASSEM.
4.	1P-3704	[8]	SEAL
5.	1D-4707	[20]	BOLT
6.	1P-5761	[4]	FLANGE
7.	8J-8197 C	[1]	CLIP
8.	5V-2532 C	[1]	HOSE ASSEM. 122 cm(48 in.)
9.	0S-1585 C	[10]	BOLT
10.	3B-4508	[2]	LOCKWASHER
11.	030-8110 C	[2]	CONNECTOR
	3K-0360 C	[2]	SEAL
12.	2V-0795	[1]	TUBE ASSEM.
13.	8J-2601 Y	[1]	VALVE GROUP (track brake)
			(Separate Illustration)
14.	005-4173	[1]	ELBOW
	2M-9780	[1]	SEAL
15.	9K-9855	[1]	TUBE ASSEM.
16.	6K-4235	[1]	TEE
	067-6684	[2]	REDUCER
	1P-0043	[2]	NUT
17.	2V-8751	[1]	TUBE ASSEM.
18.	3R-2704	[1]	UNION
19.	0S-1595 C	[2]	BOLT
20.	0S-1587	[1]	BOLT
21.	2H-3788	[11]	NUT
	5P-8245	[11]	WASHER
22.	1V-2183	[5]	CLAMP
23.	2V-8744	[1]	TUBE ASSEM.
24.	8K-3829	[1]	ANGLE
25.	2V-8748	[1]	TUBE ASSEM.
26.	2V-8750	[1]	TUBE ASSEM.
27.	6K-5535	[2]	CLIP
	6K-5536	[2]	BRACKET
28.	1D-4556	[2]	BOLT
29.	5P-8244	[8]	WASHER
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION