126-2085 CYLINDER & SEAL GP-CTWT S/N AKJ1-UP; AKX1-UP PART OF 158-0072 COUNTERWEIGHT AR AN ATTACHMENT 345B II

HYDRAULIC SYSTEM

CYLINDER GP

0. 126-2085 CYLINDER &
1. 129-7831 CYLINDER &
2. 129-7831 CYLINDER &
3. 259-0770 CYLINDER &
4. 266-8068 CYLINDER A
5. 266-8069 CYLINDER A
6. 129-7829 CYLINDER G
7. 200-3535 CYLINDER G
8. 259-0755 CYLINDER G
9. 118-3935 CYLINDER G
0. INFORMATION

EXCAVATOR 345B II EXCAVATOR AKJ
345B & 345B L Series II Excavators AKJ00001-UP (MACHINE) POWERED BY 3176C Engine SEBP3075 345B II AKJ (1999)

HYDRAULIC SYSTEM

CYLINDER GP

259-0758 CYLINDER & SEAL GP-BUCKET

259-0762 CYLINDER & SEAL GP-BUCKET

126-2085 CYLINDER & SEAL GP-CTWT

129-7831 CYLINDER & SEAL GP-STICK

259-0770 CYLINDER & SEAL GP-STICK

#SEBP30750390

126-2085: CYLINDER & SEAL GP-CTWT

CYLINDER & SEAL GP-CTWT

126-2085 CYLINDER & SEAL GP-CTWT
S/N AKJ1-UP; AKX1-UP
PART OF 158-0072 COUNTERWEIGHT AR
AN ATTACHMENT

i01308503 SEBP3075

1262085 CYLINDER & SEAL GP-CTWT Parts scheme

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	123-1078 Y	[1]	CYLINDER GP-COUNTERWEIGHT
2.	3B-8489	[2]	FITTING-GREASE (1/8-27 PTF)
3.	093-1434	[4]	SEAL-LIP TYPE
	Y		SEPARATE ILLUSTRATION

#SEBP30750391

129-7831: CYLINDER & SEAL GP-STICK

CYLINDER & SEAL GP-STICK

129-7831 CYLINDER & SEAL GP-STICK
S/N AKJ1-UP; AKX1-UP
PART OF 129-7830 CYLINDER & LINES GP-STICK
Type 1
AN ATTACHMENT

i01287689 SEBP3075

1297831 CYLINDER & SEAL GP-STICK Parts scheme

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	129-7832 Y	[1]	CYLINDER GP-STICK
2.	9X-4597	[4]	SEAL-LIP TYPE
3.	3B-8489	[1]	FITTING-GREASE (1/8-27 PTF)
	Y		SEPARATE ILLUSTRATION

#SEBP30750392

129-7831: CYLINDER & SEAL GP-STICK

CYLINDER & SEAL GP-STICK

129-7831 CYLINDER & SEAL GP-STICK
S/N AKJ1-UP; AKX1-UP
PART OF 129-7830 CYLINDER & LINES GP-STICK
Type 2
AN ATTACHMENT

i01898003 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	200-3525 CY	[1]	CYLINDER GP-STICK
2.	9X-4597	[4]	SEAL-LIP TYPE
3.	3B-8489	[1]	FITTING-GREASE (1/8-27 PTF)
	C		CHANGE FROM PREVIOUS TYPE
	Y		SEPARATE ILLUSTRATION

#SEBP30750393

259-0770: CYLINDER & SEAL GP-STICK

CYLINDER & SEAL GP-STICK

259-0770 CYLINDER & SEAL GP-STICK
S/N AKJ1-UP; AKX1-UP
PART OF 259-0769 CYLINDER & LINES GP-STICK
AN ATTACHMENT

i02504697 SEBP3075

2590770 CYLINDER & SEAL GP-STICK Parts scheme

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	259-0771 Y	[1]	CYLINDER GP-STICK
2.	9X-4597	[4]	SEAL-LIP TYPE
3.	3B-8489	[1]	FITTING-GREASE (1/8-27 PTF)
	Y		SEPARATE ILLUSTRATION

#SEBP30750394

266-8068: CYLINDER AR-BOOM

CYLINDER AR-BOOM

266-8068 CYLINDER AR-BOOM -COLD WEATHER, T-FAMILY
S/N AKJ1-UP; AKX1-UP
AN ATTACHMENT

i02504675 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name
259-0752 Y	[1]	CYLINDER & LINES GP-BOOM (LH)
259-0753 Y	[1]	CYLINDER & LINES GP-BOOM (RH)
259-0757 Y	[1]	CYLINDER & LINES GP-BUCKET
259-0769 Y	[1]	CYLINDER & LINES GP-STICK
Y		SEPARATE ILLUSTRATION

#SEBP30750395

266-8069: CYLINDER AR-BOOM

CYLINDER AR-BOOM

266-8069 CYLINDER AR-BOOM -COLD WEATHER, U-FAMILY
S/N AKJ1-UP; AKX1-UP
AN ATTACHMENT

i02504708 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Part No	Qty	Parts name
259-0752 Y	[1]	CYLINDER & LINES GP-BOOM (LH)
259-0753 Y	[1]	CYLINDER & LINES GP-BOOM (RH)
259-0761 Y	[1]	CYLINDER & LINES GP-BUCKET
259-0769 Y	[1]	CYLINDER & LINES GP-STICK
Y		SEPARATE ILLUSTRATION

#SEBP30750396

129-7829: CYLINDER GP-BOOM

CYLINDER GP-BOOM

129-7829 CYLINDER GP-BOOM
S/N AKJ1-UP; AKX1-UP
160-MM (6.3-IN) BORE X 1575-MM (62-IN) STROKE
PART OF 129-7828 CYLINDER & SEAL GP-BOOM
AN ATTACHMENT

i01287533 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	129-7879	[1]	CYLINDER AS
1A.	148-3091	[1]	BUSHING
2.	123-2112 M	[1]	LOCKNUT-SPECIAL (M90X2-THD)
3.	118-3944 J	[1]	RING
4.	9X-3604 J	[1]	SEAL AS
5.	096-3201 J	[1]	RING
6.	123-2111	[1]	PISTON
7.	6I-6785 J	[1]	RING-SEAL
8.	126-2084	[1]	STOP
9.	095-1635 J	[1]	SEAL-O-RING
10.	087-5550 J	[1]	RING-BACKUP
11.	7Y-4944	[1]	RING-RETAINING
12.	087-5551	[1]	HEAD
13.	114-0762	[1]	BUSHING
14.	128-9266 J	[1]	SEAL-BUFFER
15.	7Y-4942 J	[1]	SEAL-U-CUP
16.	7Y-4941 J	[1]	RING-BACKUP
17.	165-9291 J	[1]	SEAL-LIP TYPE
18.	129-7885	[1]	ROD AS
18A.	141-3420	[1]	BUSHING
19.	7Y-5239 M	[8]	BOLT-SOCKET HEAD (M24X3X100-MM)

			AVAILABLE REPAIR KIT(S):
	168-0760 J	[1]	KIT-SEAL (BOOM CYLINDER)
	J		KIT MARKED J INCLUDES PART(S) MARKED J
	M		METRIC PART
	R		REMANUFACTURED PART MAY BE AVAILABLE

#SEBP30750397

200-3535: CYLINDER GP-BOOM

CYLINDER GP-BOOM

200-3535 CYLINDER GP-BOOM
S/N AKJ1-UP; AKX1-UP
160-MM (6.3-IN) BORE X 1575-MM (62-IN) STROKE
PART OF 129-7828 CYLINDER & SEAL GP-BOOM
AN ATTACHMENT

i01898025 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	129-7879	[1]	CYLINDER AS
1A.	148-3091	[1]	BUSHING
2.	123-2112 M	[1]	LOCKNUT-SPECIAL (M90X2-THD)
3.	118-3944 J	[1]	RING
4.	9X-3604 J	[1]	SEAL AS
5.	096-3201 J	[1]	RING
6.	123-2111	[1]	PISTON
7.	191-3128 J	[1]	RING-SEAL
8.	126-2084	[1]	STOP
9.	095-1635 J	[1]	SEAL-O-RING
10.	087-5550 J	[1]	RING-BACKUP
11.	7Y-4944	[1]	RING-RETAINING
12.	358-8528	[1]	HEAD
13.	114-0762	[1]	BUSHING
14.	128-9266 J	[1]	SEAL-BUFFER
15.	170-9865 J	[1]	SEAL-U-CUP
16.	7Y-4941 J	[1]	RING-BACKUP
17.	165-9291 J	[1]	SEAL-LIP TYPE
18.	200-3537	[1]	ROD AS
18A.	141-3420	[1]	BUSHING
19.	7Y-5239 M	[8]	BOLT-SOCKET HEAD (M24X3X100-MM)

			AVAILABLE REPAIR KIT(S):
	200-3572 J	[1]	KIT-SEAL (BOOM CYLINDER)
	J		KIT MARKED J SERVICES PART(S) MARKED J
	M		METRIC PART
	R		REMANUFACTURED PART MAY BE AVAILABLE

#SEBP30750398

259-0755: CYLINDER GP-BOOM

CYLINDER GP-BOOM

259-0755 CYLINDER GP-BOOM
S/N AKJ1-UP; AKX1-UP
160-MM (6.3-IN) BORE X 1575-MM (62-IN) STROKE
PART OF 259-0754 CYLINDER & SEAL GP-BOOM
AN ATTACHMENT

i02504689 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	9X-3604 J	[1]	SEAL AS
2.	123-2111	[1]	PISTON
3.	123-2112 M	[1]	LOCKNUT-SPECIAL (M90X2-THD)
4.	126-2084	[1]	STOP
5.	129-7879	[1]	CYLINDER AS
5A.	148-3091	[1]	BUSHING
6.	191-3128 J	[1]	RING-SEAL
7.	200-3537	[1]	ROD AS
7A.	141-3420	[1]	BUSHING
8.	259-0734 J	[1]	SEAL-U-CUP
9.	266-7957 J	[1]	SEAL-BUFFER
10.	266-7960 J	[1]	SEAL-O-RING
11.	7Y-4941 J	[1]	RING-BACKUP
12.	7Y-4944	[1]	RING-RETAINING
13.	087-5551	[1]	HEAD
14.	165-9291 J	[1]	SEAL-LIP TYPE
15.	087-5550 J	[1]	RING-BACKUP
16.	096-3201 J	[1]	RING
17.	114-0762	[1]	BUSHING
18.	118-3944 J	[1]	RING
19.	7Y-5239 M	[8]	BOLT-SOCKET HEAD (M24X3X100-MM)

			AVAILABLE REPAIR KIT(S):
	259-0756 J	[1]	KIT-SEAL (CYLINDER)(BOOM)
	J		KIT MARKED J SERVICES PART(S) MARKED J
	M		METRIC PART
	R		REMANUFACTURED PART MAY BE AVAILABLE

#SEBP30750399

118-3935: CYLINDER GP-BUCKET

CYLINDER GP-BUCKET

118-3935 CYLINDER GP-BUCKET
S/N AKJ1-UP; AKX1-UP
160-MM (6.3IN) BORE X 1356-MM (53.4-IN) STROKE
PART OF 118-3934 CYLINDER & SEAL GP-BUCKET
AN ATTACHMENT

i01265194 SEBP3075

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Parts for your 345B II EXCAVATOR:

CATERPILLAR SIS

Pos.	Part No	Qty	Parts name
1.	118-3936	[1]	CYLINDER AS
1A.	087-5533	[1]	BUSHING
2.	123-2112 M	[1]	LOCKNUT-SPECIAL (M90X2-THD)
3.	118-3944 J	[1]	RING
4.	9X-3604 J	[1]	SEAL AS
5.	096-3201 J	[1]	RING
6.	123-2111	[1]	PISTON
7.	095-1635 J	[1]	SEAL-O-RING
8.	087-5550 J	[1]	RING-BACKUP
9.	7Y-4944	[1]	RING-RETAINING
10.	114-0762	[1]	BUSHING
11.	128-9266 J	[1]	SEAL-BUFFER
12.	087-5551	[1]	HEAD
13.	7Y-5239 M	[8]	BOLT-SOCKET HEAD (M24X3X100-MM)
14.	170-9865 J	[1]	SEAL-U-CUP
15.	7Y-4941 J	[1]	RING-BACKUP
16.	165-9291 J	[1]	SEAL-LIP TYPE
17.	247-8904	[1]	ROD AS
17A.	087-5548	[1]	BUSHING

			AVAILABLE REPAIR KIT(S):
	215-9989 J	[1]	KIT-SEAL (BUCKET CYLINDER)
	J		KIT MARKED J SERVICES PART(S) MARKED J
	M		METRIC PART
	R		REMANUFACTURED PART MAY BE AVAILABLE

Information:

HYDRAULIC SYSTEM

CYLINDER GP

Special Instruction

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}

Technical Information Bulletin

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}

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 Magazine

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}
2009/01/05

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

Caterpillar Parts SIS Catalog 345B II :

259-0762 CYLINDER & SEAL GP-BUCKET

259-0758 CYLINDER & SEAL GP-BUCKET

225-4528 CYLINDER & SEAL GP-BUCKET

173-3544 CYLINDER & SEAL GP-BUCKET

173-3540 CYLINDER & SEAL GP-BUCKET

129-7834 CYLINDER & SEAL GP-BUCKET

118-3934 CYLINDER & SEAL GP-BUCKET

129-7831 CYLINDER & SEAL GP-STICK

259-0770 CYLINDER & SEAL GP-STICK

266-8068 CYLINDER AR-BOOM

266-8069 CYLINDER AR-BOOM

129-7829 CYLINDER GP-BOOM

200-3535 CYLINDER GP-BOOM

259-0755 CYLINDER GP-BOOM

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