152-1644 CYLINDER GP-TILT -HIGH LIFT MACHINES S/N 2TW1-UP 220MM BORE X 1770MM STROKE PART OF 156-5519 LINES GP-TILT CYLINDER 988G

HYDRAULIC SYSTEM

CYLINDER GP

0. 152-1644 CYLINDER G
1. 168-6944 CYLINDER G
2. 191-3468 CYLINDER G
3. 231-1955 CYLINDER G
4. 309-9545 CYLINDER G

FILTER GP

5. 179-1557 FILTER & L
6. 179-1557 FILTER & L
7. 179-1557 FILTER & L
8. 179-1561 FILTER & M
9. 115-2129 FILTER GP-
0. INFORMATION

WHEEL LOADER 988G WHEEL LOADER 2TW
988G Wheel Loader 2TW00001-UP (MACHINE) POWERED BY 3456 Engine SEBP2742 988G 2TW (1999)

HYDRAULIC SYSTEM

CYLINDER GP

309-9546 CYLINDER GP-LIFT

309-9547 CYLINDER GP-LIFT

152-1644 CYLINDER GP-TILT

168-6944 CYLINDER GP-TILT

191-3468 CYLINDER GP-TILT

231-1955 CYLINDER GP-TILT

#SEBP27420540

152-1644: CYLINDER GP-TILT

CYLINDER GP-TILT

152-1644 CYLINDER GP-TILT -HIGH LIFT MACHINES
S/N 2TW1-UP
220MM BORE X 1770MM STROKE
PART OF 156-5519 LINES GP-TILT CYLINDER

i00990567 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	152-1646	[1]	ROD AS
	152-3739	[2]	BUSHING
2.	136-1082	[1]	PISTON
3.	196-2332	[1]	HEAD
4.	152-1645	[1]	CYLINDER AS
	152-3739	[2]	BUSHING
5.	108-0122 J	[1]	RING-BACKUP
6.	167-2220 J	[1]	SEAL AS-BUFFER
7.	225-3289 J	[1]	SEAL-WIPER
8.	6E-0496 J	[1]	RING-WEAR
9.	167-2440 J	[1]	SEAL AS
10.	6V-8237	[9]	WASHER (26X44X4-MM THK)
11.	7J-9250	[1]	LOCKNUT (3-1/4X12-THD)
12.	192-1425 J	[1]	SEAL AS
13.	8T-0666 M	[7]	BOLT (M24X3X90-MM)
14.	8T-0669 M	[2]	BOLT (M24X3X130-MM)
15.	9M-5894 J	[1]	SEAL-O-RING
16.	9X-3579 J	[1]	RING-WEAR

			AVAILABLE REPAIR KIT(S):
	229-5546	[1]	KIT-GASKET
	J		PARTS MARKED J INCLUDED IN KIT MARKED J
	M		METRIC PART
	R		REMANUFACTURED PART MAY BE AVAILABLE

#SEBP27420541

168-6944: CYLINDER GP-TILT

CYLINDER GP-TILT

168-6944 CYLINDER GP-TILT
S/N 2TW1-UP
235-MM BORE X 1290-MM STROKE
PART OF 156-4801 LINES GP-TILT CYLINDER

i01157273 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	170-2487	[1]	PISTON
2.	170-2490	[1]	ROD AS
	152-3739	[2]	BUSHING
3.	170-2492	[1]	CYLINDER AS
	152-3739	[2]	BUSHING
4.	196-2331	[1]	HEAD
5.	158-3032	[1]	RING-BACKUP
6.	167-2220	[1]	SEAL AS-BUFFER
7.	167-2336	[1]	SEAL-U-CUP
8.	167-2487	[1]	SEAL-WIPER
9.	192-1435	[1]	SEAL AS
10.	192-2049	[2]	RING-BACKUP
11.	1J-5281	[1]	RING-WEAR
12.	1U-3174	[1]	SEAL-O-RING
13.	6V-8237	[9]	WASHER (26X44X4-MM THK)
14.	7J-9250	[1]	LOCKNUT (3-1/4X12-THD)
15.	8T-0666 M	[7]	BOLT (M24X3X90-MM)
16.	8T-0669 M	[2]	BOLT (M24X3X130-MM)
17.	9X-3579	[1]	RING-WEAR
	M		METRIC PART

#SEBP27420542

191-3468: CYLINDER GP-TILT

CYLINDER GP-TILT

191-3468 CYLINDER GP-TILT
S/N 2TW1-UP
235-MM BORE X 1556-MM STROKE
PART OF 156-4801 LINES GP-TILT CYLINDER

i02402604 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	170-2487	[1]	PISTON
2.	212-3251	[1]	ROD AS
	152-3739	[2]	BUSHING
3.	191-3470	[1]	CYLINDER AS
	152-3739	[2]	BUSHING
4.	196-2331	[1]	HEAD
5.	158-3032 J	[1]	RING-BACKUP
6.	167-2220 J	[1]	SEAL AS-BUFFER
7.	167-2336 J	[1]	SEAL-U-CUP
8.	225-3289 J	[1]	SEAL-WIPER
9.	192-1435 J	[1]	SEAL AS
10.	9X-3579 J	[1]	RING-WEAR
11.	1J-5281 J	[1]	RING-WEAR
12.	1U-3174 J	[1]	SEAL-O-RING
13.	6V-8237	[9]	WASHER (26X44X4-MM THK)
14.	7J-9250	[1]	LOCKNUT (3-1/4X12-THD)
15.	8T-0666 M	[7]	BOLT (M24X3X90-MM)
16.	8T-0669 M	[2]	BOLT (M24X3X130-MM)

			AVAILABLE REPAIR KIT(S):
	261-2991 J	[1]	KIT-SEAL
	J		PARTS MARKED J INCLUDED IN KIT MARKED J
	M		METRIC PART

#SEBP27420543

231-1955: CYLINDER GP-TILT

CYLINDER GP-TILT

231-1955 CYLINDER GP-TILT
S/N 2TW1-UP
220-MM (8.7-IN) BORE X 1770-MM (69.7-IN) STROKE
PART OF 156-5519 LINES GP-TILT CYLINDER

i02103079 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	136-1082	[1]	PISTON
2.	448-8154	[1]	ROD AS
2A.	152-3739	[2]	BUSHING
3.	231-1957	[1]	CYLINDER AS
3A.	152-3739	[2]	BUSHING
4.	231-1960	[1]	HEAD
5.	108-0122 J	[1]	RING-BACKUP
6.	335-8964 J	[1]	SEAL AS-BUFFER
7.	341-3191 J	[1]	SEAL-U-CUP
8.	192-1425 J	[1]	SEAL AS
9.	335-8966 J	[1]	SEAL-WIPER
10.	6E-0496 J	[1]	RING-WEAR
11.	6V-8237	[12]	WASHER (26X44X4-MM THK)
12.	7J-9250	[1]	LOCKNUT (3-1/4X12-THD)
13.	7X-2577 M	[10]	BOLT (M24X3X90-MM)
14.	8T-0669 M	[2]	BOLT (M24X3X130-MM)
15.	9M-5894 J	[1]	SEAL-O-RING
16.	9X-3579 J	[1]	RING-WEAR

			AVAILABLE REPAIR KIT(S):
	229-5546 J	[1]	KIT-GASKET (HYDRAULIC CYLINDER)
	J		KIT MARKED J INCLUDES PART(S) MARKED J
	M		METRIC PART
	R		REMANUFACTURED PART MAY BE AVAILABLE

#SEBP27420544

309-9545: CYLINDER GP-TILT

CYLINDER GP-TILT

309-9545 CYLINDER GP-TILT
S/N 2TW1-UP
235-MM BORE X 1556-MM STROKE
PART OF 156-4801 LINES GP-TILT CYLINDER

i03786630 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	170-2487	[1]	PISTON
2.	196-2331	[1]	HEAD
3.	448-8155	[1]	ROD AS
	152-3739	[2]	BUSHING
4.	309-9548	[1]	CYLINDER AS
	152-3739	[2]	BUSHING
5.	158-3032 J	[1]	RING-BACKUP
6.	335-8964 J	[1]	SEAL AS-BUFFER
7.	341-3191 J	[1]	SEAL-U-CUP
8.	192-1435 J	[1]	SEAL AS
9.	1J-5281 J	[1]	RING-WEAR
10.	1U-3174 J	[1]	SEAL-O-RING
11.	225-3289 J	[1]	SEAL-WIPER
12.	6V-8237	[9]	WASHER (26X44X4-MM THK)
13.	7J-9250	[1]	LOCKNUT (3-1/4X12-THD)
14.	8T-0666 M	[7]	BOLT (M24X3X90-MM)
15.	8T-0669 M	[2]	BOLT (M24X3X130-MM)
16.	9X-3579 J	[1]	RING-WEAR

			AVAILABLE REPAIR KIT(S):
	261-2991 J	[1]	KIT-SEAL (HYDRAULIC CYLINDER)
	J		KIT MARKED J SERVICES PART(S) MARKED J
	M		METRIC PART

#SEBP27420545

179-1557: FILTER & LINES GP-HYDRAULIC

FILTER & LINES GP-HYDRAULIC

179-1557 FILTER & LINES GP-HYDRAULIC -CASE DRAIN
S/N 2TW1-344
PART OF 179-1561 FILTER & MTG GP-HYDRAULIC

i01191324 SEBP2742

1791557 FILTER & LINES GP-HYDRAULIC Parts scheme

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	166-4647 Y	[1]	FILTER GP-OIL (STEERING CASE DRAIN)
1A.	166-4647 Y	[1]	FILTER GP-OIL (HYDRAULIC CASE DRAIN)
1B.	166-4647 Y	[1]	FILTER GP-OIL (FAN PUMP & MOTOR CASE DRAIN)
2.	179-1551	[1]	BRACKET AS
3.	179-2210 I	[1]	HOSE AS
4.	179-2211 I	[1]	HOSE AS
5.	179-2213 I	[1]	HOSE AS
6.	179-2214 I	[1]	HOSE AS
7.	148-8360	[6]	ELBOW AS
			(EACH INCLUDES)
	6V-9182	[1]	ELBOW
	6V-9746	[1]	SEAL-O-RING
	7M-8485	[1]	SEAL-O-RING
8.	8T-4121	[12]	WASHER-HARD (11X21X2.5-MM THK)
9.	8T-4136 M	[12]	BOLT (M10X1.5X25-MM)
	I		REFER TO HYDRAULIC INFORMATION SYSTEM
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP27420546

179-1557: FILTER & LINES GP-HYDRAULIC

FILTER & LINES GP-HYDRAULIC

179-1557 FILTER & LINES GP-HYDRAULIC -CASE DRAIN
S/N 2TW345-UP
PART OF 179-1561 FILTER & MTG GP-HYDRAULIC
Type 1

i01514715 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6V-0852 C	[2]	CAP-DUST
2.	148-8430 C	[2]	TEE AS
			(EACH INCLUDES)
	7X-0873	[1]	TEE
	6V-9746	[1]	SEAL-O-RING
3.	164-5567 C	[2]	COUPLER AS-QUICK DISCONNECT (MALE)
			(EACH INCLUDES)
	6V-3965	[1]	FITTING (QUICK DISCONNECT)
	3J-1907	[1]	SEAL-O-RING
4.	166-4647 Y	[1]	FILTER GP-OIL (HYD FAN PUMP, MOTOR CASE DRAIN)
4A.	166-4647 Y	[1]	FILTER GP-OIL (HYDRAULIC PUMP CASE DRAIN)
4B.	166-4647 Y	[1]	FILTER GP-OIL (STEERING PUMP CASE DRAIN)
5.	179-2213 I	[1]	HOSE AS
6.	179-2214 I	[1]	HOSE AS
7.	203-4811 CI	[1]	HOSE AS
8.	203-5535 C	[1]	BRACKET AS
9.	203-9088 CI	[1]	HOSE AS
10.	204-0134 CI	[1]	HOSE AS
11.	204-0135 CI	[1]	HOSE AS
12.	148-8360	[6]	ELBOW AS
			(EACH INCLUDES)
	6V-9182	[1]	ELBOW
	6V-9746	[1]	SEAL-O-RING
	7M-8485	[1]	SEAL-O-RING
13.	155-2026 C	[2]	UNION AS
			(EACH INCLUDES)
	6V-8998	[1]	UNION
	5K-9090	[2]	SEAL-O-RING
14.	6V-9172 C	[2]	NUT (1-7/16-12-THD)
15.	6V-9833 C	[2]	CAP
16.	8T-4121	[12]	WASHER-HARD (11X21X2.5-MM THK)
17.	8T-4136 M	[12]	BOLT (M10X1.5X25-MM)
	C		CHANGE FROM PREVIOUS TYPE
	I		REFER TO HYDRAULIC INFORMATION SYSTEM
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP27420547

179-1557: FILTER & LINES GP-HYDRAULIC

FILTER & LINES GP-HYDRAULIC

179-1557 FILTER & LINES GP-HYDRAULIC -CASE DRAIN
S/N 2TW345-UP
PART OF 179-1561 FILTER & MTG GP-HYDRAULIC
Type 2

i01674267 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	6V-0852	[2]	CAP-DUST
2.	148-8430	[2]	TEE AS
			(EACH INCLUDES)
	7X-0873	[1]	TEE
	6V-9746	[1]	SEAL-O-RING
3.	164-5567	[2]	COUPLER AS-QUICK DISCONNECT (MALE)
			(EACH INCLUDES)
	6V-3965	[1]	FITTING (QUICK DISCONNECT)
	3J-1907	[1]	SEAL-O-RING
4.	166-4647 Y	[1]	FILTER GP-OIL (HYD FAN PUMP, MOTOR CASE DRAIN)
4A.	166-4647 Y	[1]	FILTER GP-OIL (HYDRAULIC PUMP CASE DRAIN)
4B.	166-4647 Y	[1]	FILTER GP-OIL (STEERING PUMP CASE DRAIN)
5.	179-2213 I	[1]	HOSE AS
6.	179-2214 I	[1]	HOSE AS
7.	203-4811 I	[1]	HOSE AS
8.	203-5535	[1]	BRACKET AS
9.	203-9088 I	[1]	HOSE AS
10.	204-0134 I	[1]	HOSE AS
11.	204-0135 I	[1]	HOSE AS
12.	148-8360	[6]	ELBOW AS
			(EACH INCLUDES)
	6V-9182	[1]	ELBOW
	6V-9746	[1]	SEAL-O-RING
	7M-8485	[1]	SEAL-O-RING
13.	155-2026	[2]	UNION AS
			(EACH INCLUDES)
	6V-8998	[1]	UNION
	5K-9090	[2]	SEAL-O-RING
14.	6V-9172	[2]	NUT (1-7/16-12-THD)
15.	6V-9833	[2]	CAP
16.	8T-4121	[12]	WASHER-HARD (11X21X2.5-MM THK)
17.	8T-4136 M	[12]	BOLT (M10X1.5X25-MM)
18.	148-8443 C	[1]	TEE AS
	3J-1907	[1]	SEAL-O-RING
	6V-8397	[1]	SEAL-O-RING
	7X-2459	[1]	ADAPTER-TEE
	C		CHANGE FROM PREVIOUS TYPE
	I		REFER TO HYDRAULIC INFORMATION SYSTEM
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP27420548

179-1561: FILTER & MTG GP-HYDRAULIC

FILTER & MTG GP-HYDRAULIC

179-1561 FILTER & MTG GP-HYDRAULIC -CASE DRAIN
S/N 2TW1-UP
PART OF 114-5103 HYDRAULIC AR
CANNOT BE USED WITH 179-4202 LINES GP-HYDRAULIC

i01191322 SEBP2742

1791561 FILTER & MTG GP-HYDRAULIC Parts scheme

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	179-1557 Y	[1]	FILTER & LINES GP-HYDRAULIC (CASE DRAIN)
2.	179-2209 I	[1]	HOSE AS
3.	179-2212 I	[1]	HOSE AS
4.	179-2805	[1]	BRACKET
5.	097-4896	[1]	SPACER (12X20X23-MM THK)
6.	109-7074	[1]	CONNECTOR
7.	148-8347	[1]	ELBOW AS
	6V-9007	[1]	ELBOW
	3D-2824	[1]	SEAL-O-RING
	6V-9746	[1]	SEAL-O-RING
8.	171-6723	[1]	ELBOW AS
	8T-8899	[1]	ELBOW
	6V-9746	[1]	SEAL-O-RING
9.	3P-2404	[2]	CLIP
10.	6V-1889	[7]	CLIP (LOOP)
11.	6V-9746	[1]	SEAL-O-RING
12.	7M-8485	[1]	SEAL-O-RING
13.	7X-7729	[6]	WASHER (11X25X3-MM THK)
14.	8T-4121	[5]	WASHER-HARD (11X21X2.5-MM THK)
15.	8T-4133 M	[1]	NUT (M10X1.5-THD)
16.	8T-4137 M	[2]	BOLT (M10X1.5X20-MM)
17.	8T-4185 M	[1]	BOLT (M10X1.5X50-MM)
18.	8T-4195 M	[1]	BOLT (M10X1.5X30-MM)
19.	8T-4196 M	[6]	BOLT (M10X1.5X35-MM)
20.	9M-4972	[1]	CLIP (LOOP)
	I		REFER TO HYDRAULIC INFORMATION SYSTEM
	M		METRIC PART
	Y		SEPARATE ILLUSTRATION

#SEBP27420549

115-2129: FILTER GP-OIL

FILTER GP-OIL

115-2129 FILTER GP-OIL -STEERING, IMPLEMENT, PILOT
S/N 2TW1-UP
PART OF 132-6134 LINES GP-HYDRAULIC

i00490541 SEBP2742

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Parts for your 988G WHEEL LOADER:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	465-6505	[1]	FILTER-OIL (ULTRA HIGH EFFICIENCY)
2.	376-7257 Y	[1]	SWITCH GP-PRESSURE (OIL FILTER BYPASS)
3.	3J-1907	[1]	SEAL-O-RING
4.	5F-9144	[1]	SEAL-O-RING
	Y		SEPARATE ILLUSTRATION

Information:

HYDRAULIC SYSTEM

CYLINDER GP

Special Instruction

Instructions for Installation of Oversize Hydraulic Cylinder Seals {7555, 7562}
Instructions for Installation of Oversize Hydraulic Cylinder Seals {7555, 7562}

Installation of Vented Buffer Seal Assembly, U-Cup Seal, and Double Lip Wiper Seal for Hydraulic Cylinders{7562}
Installation of Vented Buffer Seal Assembly, U-Cup Seal, and Double Lip Wiper Seal for Hydraulic Cylinders{7562}

Installation of Double Lip Wiper Seal{7562}
Installation of Double Lip Wiper Seal{7562}

Hydraulic Cylinder Repair Process {7562}
Hydraulic Cylinder Repair Process {7562}

Hydraulic Cylinder Honing {7562}
Hydraulic Cylinder Honing {7562}

Installation of Regeneration Circuit for Tilt Cylinder for Machine with 4.25 Meter Boom{1408, 5057, 5104, 512R}
Installation of Regeneration Circuit for Tilt Cylinder for Machine with 4.25 Meter Boom{1408, 5057, 5104, 512R}

Installation of Regeneration Circuit for Tilt Cylinder for Machine with 3.6 Meter Boom{1408, 5057, 5104, 512R}
Installation of Regeneration Circuit for Tilt Cylinder for Machine with 3.6 Meter Boom{1408, 5057, 5104, 512R}

Installation of Regeneration Circuit for 988G and 988H Wheel Loader Machines{1408, 5057, 5104, 512R}
Installation of Regeneration Circuit for 988G and 988H Wheel Loader Machines{1408, 5057, 5104, 512R}

Procedure to Test the Position Sensor of a Hydraulic Cylinder {1439, 7562}
Procedure to Test the Position Sensor of a Hydraulic Cylinder {1439, 7562}

Service Letter-NACD

PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING A NEW TILT CYLINDER HOSE ASSEMBLY WITH IMPROVED ROUTING ON CERTAIN 988G AND 988H WHEEL LOADERS
PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING A NEW TILT CYLINDER HOSE ASSEMBLY WITH IMPROVED ROUTING ON CERTAIN 988G AND 988H WHEEL LOADERS

PRODUCT IMPROVEMENT PROGRAM FOR REPLACING TILT CYLINDER HOSES AND TUBES ON CERTAIN 988G AND 988H WHEEL LOADERS EQUIPPED WITH THE MID-MOUNT REGEN SYSTEM
PRODUCT IMPROVEMENT PROGRAM FOR REPLACING TILT CYLINDER HOSES AND TUBES ON CERTAIN 988G AND 988H WHEEL LOADERS EQUIPPED WITH THE MID-MOUNT REGEN SYSTEM

PRODUCT SUPPORT PROGRAM FOR INSTALLING NEW HYDRAULIC CYLINDER WIPER SEALS ON CERTAIN 988G, 990 II, 992G WHEEL LOADERS D9R, D10R AND D11R TRACK TYPE TRACTORS
PRODUCT SUPPORT PROGRAM FOR INSTALLING NEW HYDRAULIC CYLINDER WIPER SEALS ON CERTAIN 988G, 990 II, 992G WHEEL LOADERS D9R, D10R AND D11R TRACK TYPE TRACTORS

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING TILT CYLINDER HOSE GUARDS ON CERTAIN 988G AND 988H WHEEL LOADERS
PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING TILT CYLINDER HOSE GUARDS ON CERTAIN 988G AND 988H WHEEL LOADERS

Service Letter-Australia

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Service Letter-CFEL

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Service Letter-CSARL

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Service Letter-Americas

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Technical Information Bulletin

The Failure of the Buffer Seal that can be Caused by a Defect in the Seal Groove on All Track-Type Tractors, Wheel Loaders, Hydraulic Excavators and Backhoe Loaders that Use Cylinders that were Manufactured After 1January 2000{7562}
The Failure of the Buffer Seal that can be Caused by a Defect in the Seal Groove on All Track-Type Tractors, Wheel Loaders, Hydraulic Excavators and Backhoe Loaders that Use Cylinders that were Manufactured After 1January 2000{7562}

Voids in the Tilt Cylinder Are Present During Backdragging Operation{5104}
Voids in the Tilt Cylinder Are Present During Backdragging Operation{5104}

Surface Finishes of Cylinder Bores{7562}
Surface Finishes of Cylinder Bores{7562}

Color Change for Cylinder Rod Seals (Wiper, U-Cup and Buffer){5100, 7555, 7562}
Color Change for Cylinder Rod Seals (Wiper, U-Cup and Buffer){5100, 7555, 7562}

Compatibility of Tilt Cylinder Rod Seals{5104, 7555}
Compatibility of Tilt Cylinder Rod Seals{5104, 7555}

Specifications

Lift Cylinder
988G Wheel Loader Electrohydraulic System

Tilt Cylinder
988G Wheel Loader Electrohydraulic System

Tool Operating Manual

Procedures for Using the 232-4686 Cylinder Washer Tank Group European Union Compliant{0374, 0599, 0680, 0738}
Procedures for Using the 232-4686 Cylinder Washer Tank Group European Union Compliant{0374, 0599, 0680, 0738}

1U-9001 and 1U-9002 Automatic Hone Tooling{0599, 0677, 0738, 7562, 7562}
1U-9001 and 1U-9002 Automatic Hone Tooling{0599, 0677, 0738, 7562, 7562}

Model HCS-40 Hydraulic Cylinder Servicer{0374, 0599, 0700, 0738, 7562}
Model HCS-40 Hydraulic Cylinder Servicer{0374, 0599, 0700, 0738, 7562}

4C-9910 Portable Hydraulic Tester (Flow 125 GPM) {0599, 0784, 5050, 5057, 5095}
4C-9910 Portable Hydraulic Tester (Flow 125 GPM) {0599, 0784, 5050, 5057, 5095}

Using the 265-4177, 265-4209 Service Tool Groups to Install Sensors in Position-Sensing Hydraulic Cylinders{0599, 0709, 0738, 1439, 7562, 7562}
Using the 265-4177, 265-4209 Service Tool Groups to Install Sensors in Position-Sensing Hydraulic Cylinders{0599, 0709, 0738, 1439, 7562, 7562}

Using the 9U-7868 and 9U-7869 Spanner Wrench to Remove and install Threaded Gland Cylinder Heads{0374, 0599, 0602, 0738}
Using the 9U-7868 and 9U-7869 Spanner Wrench to Remove and install Threaded Gland Cylinder Heads{0374, 0599, 0602, 0738}

Procedures for Using the 120-9143 Cylinder Washer Tank Group {0374, 0602, 0680, 0738}
Procedures for Using the 120-9143 Cylinder Washer Tank Group {0374, 0602, 0680, 0738}

Service Letter-China

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Service Letter-Asia

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Reuse And Salvage Guidelines

Testing Hydraulic Cylinders Using the <NOBR>188-3926</NOBR> Caterpillar Cylinder Tester and the <NOBR> 9U-6803</NOBR> Caterpillar Cylinder Tester {0784, 7562}
Testing Hydraulic Cylinders Using the 188-3926 Caterpillar Cylinder Tester and the 9U-6803 Caterpillar Cylinder Tester {0784, 7562}

Reuse Guideline for Hydraulic Cylinder Position Sensor {5574, 5736}
Reuse Guideline for Hydraulic Cylinder Position Sensor {5574, 5736}

Hydraulic Cylinder Repair Process {7562}
Hydraulic Cylinder Repair Process {7562}

Hydraulic Cylinder Honing {7562}
Hydraulic Cylinder Honing {7562}

Hydraulic Cylinder Seal Failure Analysis {7555, 7562}
Hydraulic Cylinder Seal Failure Analysis {7555, 7562}

Inspection and Salvage of Hydraulic Cylinder Components {7562}
Inspection and Salvage of Hydraulic Cylinder Components {7562}

Measuring Bores and Installing Seals in Standard and Oversized Hydraulic Cylinders {5100, 7562}
Measuring Bores and Installing Seals in Standard and Oversized Hydraulic Cylinders {5100, 7562}

Machining the O-ring Groove into the Face of Oversized Bolted Head Hydraulic Cylinders {0677, 5100, 7562}
Machining the O-ring Groove into the Face of Oversized Bolted Head Hydraulic Cylinders {0677, 5100, 7562}

HVOF Identification and Polishing (Superfinishing){0674, 0679, 1000, 7000, 7562}
HVOF Identification and Polishing (Superfinishing){0674, 0679, 1000, 7000, 7562}

Thermal Spray Procedures for Hydraulic Cylinder Rods{0679, 7562, 7562}
Thermal Spray Procedures for Hydraulic Cylinder Rods{0679, 7562, 7562}

Contamination Control Guidelines

Hydraulic Cylinder Honing {7562}
Hydraulic Cylinder Honing {7562}

Applied Failure Analysis

Hydraulic Cylinder Seal Failure Analysis {7555, 7562}
Hydraulic Cylinder Seal Failure Analysis {7555, 7562}

Service Letter-APD

PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS
PRODUCT SUPPORT PROGRAM FOR REPLACING LEAKING TILT CYLINDER ASSEMBLY ON CERTAIN 988G WHEEL LOADERS

Testing and Adjusting

Implement Hydraulic Service Mode
988G Wheel Loader Electrohydraulic System

Tilt Cylinder - Isolation and Drift Check
988G Wheel Loader Electrohydraulic System

Lift and Tilt Cylinder Drift - Check
988G Wheel Loader Electrohydraulic System

Lift Cylinder - Isolation and Drift Check
988G Wheel Loader Electrohydraulic System

Implement Cycle Time - Check
988G Wheel Loader Electrohydraulic System

Position Sensor for the Tilt Cylinder (Electronic Technician) - Calibrate
988G Wheel Loader Electrohydraulic System

Position Sensor for the Lift Cylinder (Electronic Technician) - Calibrate
988G Wheel Loader Electrohydraulic System

Bench Test Procedures

Disassembly and Assembly

Tilt Cylinder - Remove
988G Wheel Loader Machine Systems

Tilt Cylinder - Install
988G Wheel Loader Machine Systems

Tilt Cylinder, Boom Links, and Bucket Links - Remove
988G Wheel Loader Machine Systems

Tilt Cylinder, Boom Links, and Bucket Links - Install
988G Wheel Loader Machine Systems

Lift Cylinder - Remove and Install
988G Wheel Loader Machine Systems

Service Magazine

New Backup Rings Are Available for Sealing Hydraulic Cylinders with Pitted Grooves {4303, 5102, 5104, 5106, 5456, 7562}
2002/07/01

New Seals and Backup Rings for Hydraulic Cylinders are Available {4303, 5102, 5104, 7562}
2001/08/06

New Assembly Instructions for Rod Seals on Hydraulic Cylinders are Available {7562}
2001/07/30

Correctly Assembling the Buffer Seal Will Prevent Failure of the U-Cup Seals {7562}
2001/07/30

New Tools are Available for Installing Cylinder Rod Seals {0738, 5102, 5104}
2001/09/24

Correction to Troubleshooting and Testing and Adjusting , "Implement Cycle Time - Check" {6000}
2002/08/12

Double Lip Wiper Seals Must Be Installed Properly {7562}
2002/12/09

Procedure Now Available to Test the Position Sensor of a Hydraulic Cylinder {1439, 7562}
2012/10/04

Compatible Puller Stud and Hydraulic Cylinder Capacity Chart {0599, 7000, 7562}
2011/10/17

A Tilt Regeneration Kit Is Now Available for the 988G and 988H Machines {1408, 5057, 5104, 512R}
2009/05/04

Improved Implement Software for the Tilt Cylinder Seal is Now Available for Certain 988G and 988H Wheel Loaders {5104, 5112, 5701, 7610, 7620}
2010/05/10

A Rework Procedure Improves the Seal Assembly Performance in Hydraulic Cylinders on Cat Products {7562}
2010/04/30

New Head and Rod Seals Are Now Available for 988G and 988H Large Wheel Loader Tilt Cylinders {5104, 7555}
2015/07/15

Caterpillar Parts SIS Catalog 988G :

309-9547 CYLINDER GP-LIFT

309-9546 CYLINDER GP-LIFT

173-8613 CYLINDER GP-LIFT

173-8612 CYLINDER GP-LIFT

168-6943 CYLINDER GP-LIFT

168-6942 CYLINDER GP-LIFT

168-6944 CYLINDER GP-TILT

191-3468 CYLINDER GP-TILT

231-1955 CYLINDER GP-TILT

309-9545 CYLINDER GP-TILT

179-1557 FILTER & LINES GP-HYDRAULIC

179-1561 FILTER & MTG GP-HYDRAULIC

Truck sale:

Caterpillar 988G
- Wheel Loaders
FINANZAUTO S.A.

69,000

Caterpillar 988G, Wheel Loaders, Construction
- Wheel Loaders
FABICK CAT

Caterpillar 988G/H HIGH LIFT CYLINDER AND BUCKET, bucket, Construction
- bucket
WILLIAM ADAMS PTY. LTD.

Caterpillar 988G/H, bucket, Construction
- bucket
WILLIAM ADAMS PTY. LTD.

72,000

Caterpillar 988G, Wheel Loaders, Construction
- Wheel Loaders
MACALLISTER MACHINERY CO., INC