User's Manual

7308-618
Troubleshooting
Problem Cause Solution
Hydraulic Motor stops running. W orn valve or valve balls (3);
broken valve spring (18).
Repair valve. See page 8.
Broken trip rod (17), spring (12) or
retainers (11).
Replace parts. See page 8.
Poor performance or reduced ef fi-
ciency.
W orn piston seals (5, 6, 7). Replace seals. See page 8.
Oil leaking around cylinder . W orn cylinder o-rings (2). Replace o-rings. See page 8.
Loose tie rods (37). T ighten nuts (27). See page 10.
Oil leaking around inlet or return
tube fittings.
Loose fittings or worn fitting
o-rings (31, 34, and 38).
T ighten or replace fittings. See
page 8.
Excessive oil in drain bottle, or
bottle needs frequent emptying.
W orn seals (2, 15, 14, and 49) in
bottom cylinder cap.
Replace seals. See page 8.
Service
Required Tools
 Set of allen wrenches
 Set of socket or box wrenches
 Adjustable wrench
 T orque wrench
 Spanner wrench
 O-ring pick
 10–24 unc–2b tap
 Vise

Shallow metal or plastic pan (approx. 12 x 20 in.)
 Repair T ool 189–305 (see page 14)
 Thread lubricant
 Lithium-base grease
 Fresh Loctite  242 thread sealant and Loctite 
Primer T or Perma-Loc  115 thread sealant and
Perma-Bond Surface Conditioner I
 Chlorinated solvent