Woods Equipment 1050 manual Dealer Service, Hydraulic Cylinder Repair

DEALER SERVICE

The information in this section￿￿￿￿￿￿￿is written for dealer ser- vice personnel. The repair described here requires special skills and tools. If your shop is not properly equipped or your mechanics are not properly trained in this type of repair, it may be more time and cost effec- tive to replace complete assemblies.

„Keep hands and body away from pressurized lines. Use paper or cardboard, not hands or other body parts to check for leaks. Wear safety goggles. Hydraulic fluid under pressure can easily penetrate skin and will cause serious injury or death.

„Make sure that all operating and service person- nel know that if hydraulic fluid penetrates skin, it must be surgically removed as soon as possible by a doctor familiar with this form of injury or gan- grene, serious injury, or death will result. CON-

TACT A PHYSICIAN IMMEDIATELY IF FLUID ENTERS SKIN OR EYES. DO NOT DELAY.

„Before working on backhoe, extend boom and dipperstick and place bucket on ground. Make sure that all system pressure has been relieved by oper- ating controls before maintenance, service, or dis- connecting any hydraulic lines.

CAUTION

„Always wear relatively tight and belted clothing to avoid getting caught in moving parts. Wear sturdy, rough-soled work shoes and protective

equipment for eyes, hair, hands, hearing, and head; and respirator or filter mask where appropriate.

HYDRAULIC CYLINDER REPAIR

General Hydraulic Repair Information

A clean working area is essential for any hydraulic repair.

All parts must be carefully cleaned before reassembly. We recommend that when repairing hydraulic compo- nents, you always replace existing seals with new ones. Clean all components in solvent and blow dry with low pressure air.

Boom, Dipperstick, Bucket & Stabilizer Cylinders (Figure 14)

Disassembly

On the 2" or 2-1/2" spanner nut type cylinders, Figure 14, unscrew spanner nut (4) using a spanner wrench, or carefully use a punch and hammer.

Tap rod guide (5) into cylinder body (8) about 1/2". Remove retaining ring (3B). Pull on rod (1) to remove parts from barrel.

Clamp cross pin end of rod assembly (1) in a vise with protective jaws. Remove lock nut (7) from rod assem- bly. Remove piston (6) and rod guide (5) from rod.

Remove and discard all seals, wear rings and O-rings. Clean all components in solvent and blow dry with low pressure air.

	2" Cylinder		2-1/2" Cylinder
1.	Piston rod	1.	Piston rod
2.	Grease fitting	2.	Grease fitting
3A. 3/4 x 7/8" O-Ring		3A. 3/4 x 7/8" O-Ring
3B. 2" Internal retaining ring		3B. 2-1/2" Internal retaining ring
3C. 1-1/4" Wiper ring		3C. 1-1/4" Wiper ring
3D. 1-1/4 x 1-1/2 x 1/4" Seal		3D. 1-1/4 x 1-5/8 x 5/16" U-Cup seal
3E. 1-13/16 x 2" Back-up ring		3E. 2-1/4 x 2-1/2" Back-up ring
3F.	1-13/16 x 2" O-Ring	3F.	2-1/4 x 2-1/2" O-Ring
3G. 2" Piston seal		3G. 2-1/2" Piston seal
3H.	2 x 1/4 x 1/8" Wear ring	3H.	2-1/2 x 1/4 x 1/8" Wear ring
4.	1/4 x 2-3/8"Spanner nut	4.	1/4 x 2-7/8"Spanner nut
5.	2" OD x 1-1/4" ID Guide	5.	2-1/2" OD x 1-1/4" ID Guide
6.	2" OD Piston	6.	2-1/2" OD Piston
7.	34" NF - 16 Lock nut	7.	7/8" NF - 14 Lock nut
8.	2" ID Cylinder body	8.	2-1/2" ID Cylinder body

Figure 14. Spanner Nut Type Hydraulic Cylinder Assemblies

51861 (Rev. 6/16/2006) Dealer Service 21