Woods Equipment 1050 - Manual (Page 21)

Dealer Service 21
51861 (Rev. 6/16/2006)
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-
TA C T A P H YS I C I A N I M M E D I AT E LY I F FL U I D
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.
„ 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.
Figure 14. Spanner Nut Type Hydraulic Cylinder Assemblies
WARNING
CAUTION
2" Cylinder
1. Piston rod
2. Grease fitting
3A. 3/4 x 7/8" O-Ring
3B. 2" Internal retaining ring
3C. 1-1/4" Wiper ring
3D. 1-1/4 x 1-1/2 x 1/4" Seal
3E. 1-13/16 x 2" Back-up ring
3F. 1-13/16 x 2" O-Ring
3G. 2" Piston seal
3H. 2 x 1/4 x 1/8" Wear ring
4. 1/4 x 2-3/8"Spanner nut
5. 2" OD x 1-1/4" ID Guide
6. 2" OD Piston
7. 34" NF - 16 Lock nut
8. 2" ID Cylinder body
2-1/2" Cylinder
1. Piston rod
2. Grease fitting
3A. 3/4 x 7/8" O-Ring
3B. 2-1/2" Internal retaining ring
3C. 1-1/4" Wiper ring
3D. 1-1/4 x 1-5/8 x 5/16" U-Cup seal
3E. 2-1/4 x 2-1/2" Back-up ring
3F. 2-1/4 x 2-1/2" O-Ring
3G. 2-1/2" Piston seal
3H. 2-1/2 x 1/4 x 1/8" Wear ring
4. 1/4 x 2-7/8"Spanner nut
5. 2-1/2" OD x 1-1/4" ID Guide
6. 2-1/2" OD Piston
7. 7/8" NF - 14 Lock nut
8. 2-1/2" ID Cylinder body