8D8110 TRANSMISSION CONTROL GROUP--Part 1 of 3 621 WHEEL TRACTOR

OPERATOR STATION

CONTROL GP-TRANSMISSION

0. 8D-8110 CONTROL GP
1. 8D-8110 CONTROL GP
2. 8D-8110 CONTROL GP

POWER TRAIN

GEAR GP

3. 2P-9240 TRANSFER C
4. 2P-9240 TRANSFER C

TORQUE CONVERTER GP

5. 3P-1630 TORQUE CON

MANIFOLD & SCREENS GP

6. 8S-0660 MANIFOLD &

GOVERNOR GP

7. 3P-0367 GOVERNOR &
8. 8S-6340 GOVERNOR G

PUMP GP

9. 3P-0203 PUMP GP-SC
0. INFORMATION

WHEEL TRACTOR 621 WHEEL TRACTOR 2DB
621B SCRAPER 2DB00001-UP (MACHINE) SEBP2429 621 2DB (1983)

OPERATOR STATION

CONTROL GP-TRANSMISSION

8D-8110 CONTROL GP-TRANSMISSION

#SEBP24290140

8D-8110: CONTROL GP-TRANSMISSION

CONTROL GP-TRANSMISSION

8D8110 TRANSMISSION CONTROL GROUP--Part 1 of 3

c939455 SEBP2429

8D8110 CONTROL GP-TRANSMISSION Parts scheme

For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2J-3118	[7]	BOLT
2.	5M-2894	[10]	WASHER
3.	8D-8450	[1]	COVER
	8D-8451	[1]	GASKET
4.	1B-2578	[3]	NUT
5.	8D-8446	[1]	HOUSING
	8D-8453	[1]	GASKET
6.	4B-3643	[1]	SETSCREW
7.	5D-6383	[1]	PIN
8.	1D-5117	[1]	NUT
9.	5D-6366	[1]	LEVER
10.	8D-8456	[2]	SPRING
11.	8D-8447	[1]	SPRING
12.	5D-0353	[2]	BOLT
13.	5B-0986	[1]	SCREW
14.	5T-1337	[1]	LEVER ASSEM.
			(Includes)
15.	3D-8823	[2]	BEARING
16.	1B-8702	[1]	KEY

#SEBP24290141

8D-8110: CONTROL GP-TRANSMISSION

CONTROL GP-TRANSMISSION

8D8110 TRANSMISSION CONTROL GROUP--Part 2 of 3
6D856 Valve parts are shown on Page 116

c174499 SEBP2429

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2A-1736	[1]	HANDLE
2.	5D-6382	[1]	ROD
3.	5D-6379	[1]	PLATE ASSEM.
4.	4D-0506	[1]	HANDLE
5.	5B-8407	[1]	PIN
6.	5F-7464	[1]	SPRING
7.	1A-8912	[1]	WASHER
8.		[1]	PIN
	3B-4611	[1]	COTTER PIN
9.	8D-8461	[1]	HOUSING ASSEM.
			(Includes)
10.	5H-7179	[2]	BEARING
11.	3D-5702	[1]	BEARING
12.	8D-6889	[1]	PEDAL
13.	8D-3372	[1]	PIN
	3B-4607	[1]	COTTER PIN
14.		[1]	BOLT
	1B-2578	[1]	NUT
15.	5M-9708	[1]	SPRING
16.	6D-0856 Y	[1]	VALVE
			(Separate Illustration)
17.	5K-9246	[2]	CONNECTOR
18.	2J-3118	[1]	BOLT
19.	8D-8955	[1]	TUBE ASSEM.
20.	3D-7587	[1]	UNION
21.	7D-4786	[2]	PLUG
22.	5P-9938 C	[6]	BOLT
	5M-2894 C	[6]	WASHER
23.	7D-3494	[1]	HOSE ASSEM. 241.30 cm(95 in.)
24.	9M-8406	[1]	CLIP
25.	4H-6147	[1]	UNION
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#SEBP24290142

8D-8110: CONTROL GP-TRANSMISSION

CONTROL GP-TRANSMISSION

8D8110 TRANSMISSION CONTROL GROUP--Part 3 of 3

c174500 SEBP2429

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4B-3388	[1]	BOLT
	3B-4505	[1]	LOCKWASHER
2.	7H-3641	[1]	ROD END
3.	9D-4339	[1]	CABLE
4.	5M-2894 C	[15]	WASHER
5.	8D-8449	[1]	LEVER
	1B-8706	[1]	KEY
6.	030-8538 C	[3]	BOLT
	5P-8245 C	[3]	WASHER
7.	5D-0353 C	[3]	BOLT
8.	8D-7828	[1]	HOUSING
	8D-8459	[1]	GASKET
9.	2J-3118 C	[9]	BOLT
10.	8D-8460	[1]	SHAFT
11.	6D-3479	[1]	CLIP
12.	5H-1190	[1]	SEAL
13.	031-0219 C	[2]	BOLT
	1D-4717	[2]	NUT
14.	4B-4281	[2]	WASHER
15.	8D-8455	[1]	COVER
	8D-8454	[1]	GASKET
16.	4J-2684	[1]	LEVER
	1B-8702	[1]	KEY
17.	3K-8280	[1]	PIN
	3B-4617	[1]	COTTER PIN
18.	8D-8458	[1]	COVER
	8D-8457	[1]	GASKET
19.	4J-2701	[1]	ROD END
	C		INDICATES CHANGE

#SEBP24290143

2P-9240: TRANSFER CASE & GEAR GP

TRANSFER CASE & GEAR GP

2P9240 TRANSFER GEAR GROUP--Part 1 of 2
Part of 7G2780 Transmission Arrangement shown on Page 102

c939456 SEBP2429

2P9240 TRANSFER CASE & GEAR GP Parts scheme

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6F-0711	[4]	SEAL
2.	9S-8004	[3]	PLUG
	3J-1907	[3]	SEAL
3.	0S-1585	[8]	BOLT
4.	3B-4508	[17]	LOCKWASHER
5.	3P-9089	[1]	ADAPTER
6.	5M-1932	[7]	STUD
7.	1D-4719	[9]	NUT
8.	9L-8496	[1]	TEE
9.	2P-7054	[1]	GEAR (70 teeth)
10.	2S-6530	[1]	CAGE
11.	3K-0526	[1]	BEARING
12.	3B-1915	[3]	BOLT
13.	5H-6199	[1]	RING
14.	2P-9154	[1]	CASE ASSEM.
			(Includes)
15.	9S-5214	[1]	BEARING
16.	1F-1006	[1]	DOWEL
17.	9S-2793	[1]	TUBE
18.	9S-2794	[1]	TUBE
19.	9S-2795	[1]	TUBE
20.	9S-2796	[1]	TUBE
21.	2B-0947	[2]	BOLT
22.	2B-2404	[2]	CLIP
	0T-0102	[2]	BOLT
23.	3P-7484	[1]	TUBE ASSEM.

#SEBP24290144

2P-9240: TRANSFER CASE & GEAR GP

TRANSFER CASE & GEAR GP

2P9240 TRANSFER GEAR GROUP--Part 2 of 2
Part of 7G2780 Transmission Arrangement shown on Page 102

c939457 SEBP2429

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	2P-9226	[1]	CAGE ASSEM.
			(Includes)
2.	2M-1538	[2]	STUD
3.	1A-2029	[28]	BOLT
4.	3B-4506	[18]	LOCKWASHER
5.	5K-9243	[1]	ELBOW
6.	3K-8460	[1]	PLUG
	1J-9671	[1]	SEAL
7.	2D-8822	[2]	STUD
8.	8P-1425	[1]	TUBE ASSEM.
	5P-5910	[1]	BONNET
9.	2P-7003	[1]	GEAR (86 teeth)
10.	030-0061	[6]	CONE
	030-0060	[6]	CUP
11.	9H-3360	[1]	SEAL
12.	2P-7004	[1]	GEAR (86 teeth)
13.	8S-0615	[2]	SHIM PACK
14.	3B-1915	[6]	BOLT
15.	2P-7021	[1]	CAGE
16.	7B-3235	[5]	BOLT
	3B-4508	[5]	LOCKWASHER
17.	2P-7039	[1]	GEAR (77 teeth)
18.	2P-7005	[1]	GEAR (75 teeth)
19.	2P-7023	[1]	SHIM PACK
20.	3J-0634	[1]	SEAL
21.	2P-7022	[1]	CAGE
22.	3F-5792	[1]	SEAL
23.	8S-0617	[1]	COVER
24.	2M-1309	[1]	SEAL

#SEBP24290145

3P-1630: TORQUE CONVERTER GP-W/O HSG

TORQUE CONVERTER GP-W/O HSG

3P1630 TORQUE CONVERTER GROUP
Part of 7G2780 Transmission Arrangement shown on Page 102

c939458 SEBP2429

3P1630 TORQUE CONVERTER GP-W/O HSG Parts scheme

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	0S-1594	[48]	BOLT
2.	1T-0689	[36]	WASHER
3.	1T-0651	[2]	RING
4.	1T-1078	[2]	BEARING
5.	1T-1079	[1]	HUB (impeller)
6.	1T-1085	[1]	CARRIER ASSEM.
			(Includes)
7.	1T-0767	[1]	BEARING
8.	1T-0649	[1]	RING
9.	1T-1082	[1]	HUB (turbine)
10.	9S-8840	[1]	SHAFT
11.	1T-0648	[1]	SEAL
12.	1T-1348	[1]	SUPPORT ASSEM.
13.	1T-0669	[1]	HOUSING
14.	1T-0704	[1]	PLATE
15.	1T-0657	[2]	PLATE
16.	1T-0861	[1]	IMPELLER
17.	1T-0680	[11]	SPRING
18.	1T-0679	[11]	ROLLER
19.	1T-0681	[1]	CAM
20.	1T-0662	[1]	TURBINE
21.	1T-0665	[1]	RING
22.	6F-7030	[20]	BOLT
23.	0S-1621	[12]	BOLT
24.	1T-0762	[1]	RACE
25.	1T-0966	[1]	FLANGE ASSEM.
			(Includes)
26.	1T-0647	[1]	BEARING
27.	2S-7978 H	[1]	WASHER
28.	9M-1975 H	[1]	RING
29.	3H-1816 H	[1]	RING
30.	1T-0686	[3]	RACE
31.	1T-0655	[2]	BEARING
32.	1T-0813	[1]	STATOR
33.	4B-4158	[2]	SCREW
34.		[1]	PLATE
	H		NOT PART OF 1T1065 TORQUE CONV

#SEBP24290146

8S-0660: MANIFOLD & SCREENS GP

MANIFOLD & SCREENS GP

8S660 MANIFOLD AND SCREEN GROUP
Part of 7G2780 Transmission Arrangement shown on Page 102

c213156 SEBP2429

8S0660 MANIFOLD & SCREENS GP Parts scheme

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8S-0621 C	[1]	MANIFOLD-PUMP
2.	2H-3931	[1]	SEAL-O-RING
3.	4J-8997	[1]	SEAL
4.	9S-4191	[1]	PLUG-O-RING
	3J-1907	[1]	SEAL
5.	5B-0213	[4]	BOLT
6.	3B-4506	[20]	LOCKWASHER
7.	8M-4987	[2]	SEAL-O-RING
8.	1A-2029	[6]	BOLT
9.	8M-4992	[1]	SEAL 40.87MM(1.61 IN)ID
	8M-4443	[1]	SEAL 44.04MM(1.73 IN)ID
10.	9S-4182	[1]	PLUG
	3J-7354	[1]	SEAL-O-RING
11.	8S-0624 C	[1]	COVER AS
12.	7S-2962	[1]	WASHER-SPRING
	7B-3028	[2]	SCREW-DRIVE
13.	0S-1619	[8]	BOLT
14.	8S-0626	[1]	GASKET-MANIFOLD
15.	3S-3875	[1]	SCREEN-SUCTION
16.	2S-1641	[1]	TUBE AS-SCREEN
17.	8M-7160	[4]	MAGNET
18.	8H-7521	[1]	SEAL-O-RING
19.	3L-6917	[1]	RING-RETAINING
20.	1S-5582	[1]	COUPLING
21.	8M-5007	[1]	SEAL-O-RING
22.	0S-1571	[2]	BOLT
23.	0S-1590	[2]	BOLT
	5M-2894	[2]	WASHER
24.	2F-8616	[1]	NUT-SELF LOCKING
25.	1S-5594	[1]	TUBE
26.	3D-7388	[1]	SCREEN AS-SUCTION
27.	2S-6541	[1]	COVER AS-SUPPORT
28.	5M-1054	[1]	STUD-TAPERLOCK
	C		CHANGE FROM PREVIOUS TYPE

#SEBP24290147

3P-0367: GOVERNOR & DRIVE GP

GOVERNOR & DRIVE GP

3P367 GOVERNOR AND DRIVE GROUP
Part of 7G2780 Transmission Arrangement shown on Page 102
8S6340 Governor parts are shown on Page 125

c223966 SEBP2429

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	8S-0629	[1]	GASKET
2.	3P-0368	[1]	SHAFT
3.	3P-0369	[1]	GEAR (70 teeth)
4.	9P-9266 C	[1]	GEAR ASSEM. (45 teeth)
			(Includes)
5.	9S-5213	[1]	BEARING
6.	8F-3252 C	[1]	ORIFICE
7.	1D-4541	[1]	BOLT
	9M-1974	[1]	WASHER
8.	5S-7926	[1]	GEAR (39 teeth)
9.	8M-4389	[1]	SEAL
10.	8S-6340 Y	[1]	GOVERNOR GROUP
			(Separate Illustration)
11.	4F-2291	[1]	KEY
12.	8M-5251	[3]	SEAL
13.	9S-4191	[5]	PLUG
	3J-1907	[5]	SEAL
14.	5S-7053	[1]	RING
15.	5S-7770	[6]	WASHER
16.	5S-7037	[1]	SHAFT
17.	8S-0628	[1]	COVER ASSEM.
			(Includes)
18.	9S-5214	[1]	BEARING
19.	5B-5812	[1]	DOWEL
20.	7G-8265 C	[1]	SHAFT ASSEM.
			(Includes)
21.	010-2571	[3]	SETSCREW
22.	1A-2029	[13]	BOLT
	3B-4506	[13]	LOCKWASHER
	C		INDICATES CHANGE
	Y		SEPARATE ILLUSTRATION

#SEBP24290148

8S-6340: GOVERNOR GP

GOVERNOR GP

8S6340 GOVERNOR GROUP
Part of 3P367 Governor and Drive Group shown on Page 124

c228448 SEBP2429

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	5S-7787	[1]	SLUG (short)
	5S-7788	[1]	STOP
			- OR -
	7G-2946 C	[1]	SLUG (long)
	7G-2945 C	[1]	STOP
2.	5S-7771	[1]	STOP
3.	5S-4445	[1]	STOP
4.	5S-4455	[3]	RING
5.	2R-1256	[2]	RING
6.	5S-4461	[1]	SLUG
	C		INDICATES CHANGE

#SEBP24290149

3P-0203: PUMP GP-SCAVENGE

PUMP GP-SCAVENGE

3P203 SCAVENGE PUMP GROUP
Part of 7G2780 Transmission Arrangement shown on Page 102

c201330 SEBP2429

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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	4M-0501	[1]	BODY AS-PUMP
2.	8M-8489	[4]	DOWEL
3.	0T-0573	[2]	BOLT (2.75 IN LONG)
4.	3S-0004	[6]	WASHER
5.	3S-1340	[1]	BASE AS-OIL PUMP
6.	1M-3780	[2]	BEARING
7.	7S-8597	[1]	GEAR AS-OIL PUMP (12 TEETH-IDLER)
8.	2P-9318	[1]	GEAR AS-OIL PUMP (12 TEETH-IDLER)
9.	8M-5007	[2]	SEAL-O-RING
10.	2S-1454	[1]	COVER AS-PUMP
11.	1M-3780	[2]	BEARING
12.	9S-4191	[1]	PLUG-O-RING
	3J-1907	[1]	SEAL
13.	0L-1143	[4]	BOLT (2.50 IN LONG)