Usage:
Various Caterpillar Machines Using Angle, Bucket, Lift, Side Dump, Stabilizer, Steering, Stick, Tilt, Or Tip Hydraulic Cylinder Groups
- SUPPLEMENT: 03 31 97
Service Magazine, September 16, 1996; Page 9; "Snap Ring Retains Rod Wiper Seal In Several Hydraulic Cylinder Groups"
In Chart A, the part number at the intersection of the Ring-Retaining column and the 3G-5291 Tilt Cylinder Group row is not correct. The correct Ring-Retaining part number for the 3G-5291 Tilt Cylinder Group is 6V-5203.
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Description of Change: A snap ring retains the rod wiper seal in the hydraulic cylinder groups listed in this article. Cylinder groups, before this change, used bolts with washers or bearing mount sealant to retain the wiper seal.
Some cylinder groups require new cylinder heads, revised cylinder heads with new wear rings, or revised heads to use the snap ring.
Adaptable To: This change is effective with the engineering change number for cylinder groups listed in the following charts.
NOTE: An engineering change number indicates effectivity of this improvement. The cylinder group part number, engineering change number, date of manufacture, and serial number are found on the cylinder assembly near the rod end port. Cylinder heads are marked with a part number and engineering change number.
Cylinder groups with engineering change numbers less than the engineering change numbers (listed in the charts) are adaptable.
Illustration 1 and Chart A identify service parts needed to change retention of the lip-seal, from bolts and washers, to snap ring retention. New cylinder heads are required for most of the cylinder groups in Chart A.
Illustration 2 and Chart B identify service parts needed to change retention of the lip-seal, from bearing mount sealant, to snap ring retention. Revised cylinder heads and new wear rings are required. (Snap ring grooves were added and the wear ring groove was narrowed).
Illustration 3 and Chart C also identify service parts needed to change retention of the lip-seal, from bearing mount sealant, to snap ring retention. Revised cylinder heads are required. (Snap ring grooves were added).
Illustration 1. Service parts needed to change retention of the lip-seal, from bolts and washers, to snap ring retention. View A: Snap ring retention. (1) Cylinder head. (2) Snap ring. View B: Bolt and washer retention. (1) Cylinder head. (C) Bolt. (D) Washer.
NOTE: For cylinder groups not using a new head, with the snap ring groove, the revised cylinder head is used.
Illustration 2. Service parts needed to change retention of the lip-seal, from bearing mount sealant, to snap ring retention. View E: Snap ring retention. (1) Revised 9T-3508 Cylinder Head [Engineering Change 03]. (2) 9T-2584 Ring-Retaining [snap ring]. (3) New 8T-3329 Wear Ring. View F: Bearing sealant retention. (1) Former 9T-3508 Cylinder Head. (3) Former 8T-6746 Wear Ring. (G) Bearing mount sealant.
NOTE: The revised cylinder head has the snap ring groove and narrower wear ring groove.
Illustration 3. Service parts needed to change retention of the lip-seal, from bearing mount sealant, to snap ring retention. View H: Snap ring retention. (1) Revised 9T-9258 Cylinder Head [engineering change 01]. (2) 8J-0484 Ring-Retaining [snap ring]. View K: Bearing sealant retention. (1) Existing 9T-9258 Cylinder Head. (G) Bearing mount sealant. Note: The revised cylinder head has the snap ring groove.
