Repairs
4 - 20
Winch Assembly
All components should be inspected for wear or damage
as they are removed. Refer to Figure 4-7, Visual Inspection.
All seals that were removed should be replaced during
assembly. Carefully inspect all bearings that have been
removed. Used bearings often appear satisfactory, but
may fail when placed under a load. When in doubt, it is
recommended to install a new bearing. Any component
that indicates excessive wear or damage should be
replaced. The following reassembly and installation
sequence assumes a complete winch overhaul.
NOTE: Refer to Figure 1-6, Torque Specifi cations on
page 1-5, for torque values.
Figure 4-7 Visual Inspection
ITEM
INSPECTION REQUIREMENTS
CORRECTIVE ACTION
Brake Assembly
Check for cracked or broken belleville/coil
springs.
Replace springs if cracked or broken.
Inspect housing and covers for leakage or
damage.
Replace component if sealing surfaces or splines
are damaged.
Check the rotor discs for wear, distortion,
or damage. The discs should be free of
hydraulic oil.
Replace the rotor discs if the wear grooves are
worn away, the discs are burned, damaged,
warped, or exposed to oil. Brake cleaner may
be used to clean dust from the discs but will not
remove impregnated oil.
Check the brake/motor shaft seals for
leakage into the brake housing.
Replace damaged seals.
Inspect the brake/motor shaft for wear or
damage.
Replace a damaged shaft.
Check that the stator discs are fl at, free of
damaged surfaces.
Replace damaged stator discs.
Inspect the piston for damage. Make sure
the seal groove and sealing surfaces are
in good condition.
Replace a damaged piston. Always replace the
piston seals when the brake is repaired.
Planetary Reducer
Assembly
Check the cover for leakage or damage.
Repair or replace assembly.
Check output shaft bearing end play.
End play is 0.000-0.006”. End play is adjusted
using the appropriate thickness retaining ring. See
parts manual.
Inspect sun gear and carrier assembly for
damage or wear. Sun gear should spin
freely in carrier assembly.
Replace assembly.
Winch Motor
Inspect motor shaft seal for wear or
damage.
Note: A leaky motor shaft seal will contaminate
the brake with oil and the brake will likely require
service. Replace seal.
D i r e c t i o n C o n t r o l
Manifold
Check that all passages and cartridge
valves are free of contaminants.
Clean or replace cartridge valves. Clean all
hydraulic passages.
Control Manifold
Check that all passages and cartridge
valves are free of contaminants.
Clean or replace cartridge valves. Clean all
hydraulic passages.
Check torque on solenoid coils. Do not
over-tighten.
Check that solenoid spool moves freely. Replace
cartridge if stiction is present. Torque for solenoid
cartridge is 12-15 ft-lbs. Torque for coil retaining
nut is 1-2 ft-lbs.
- Winch Assembly
(continued on next page)
Summary of Contents for H12E
Page 8: ...vi Notes ...
Page 48: ...General 1 40 Notes ...
Page 54: ...Section 1 1 46 Figure 1 35 H12E Hydraulic Electrical Schematic Option Code B CAT D8T C74 ...
Page 55: ...Section 1 1 47 Figure 1 36 H12E Hydraulic Electrical Schematic Option Code D CAT D8T C74 ...
Page 59: ...Section 1 1 51 Figure 1 40 H12E Hydraulic Electrical Schematic Option Code D CAT D8R C59 ...
Page 63: ...Troubleshooting 2 4 Notes ...
Page 75: ...Service 3 12 Notes ...
Page 90: ...Section 4 4 15 Intentionally Blank ...
Page 102: ...Section 4 4 27 Intentionally Blank ...
Page 108: ...Section 4 4 33 Intentionally Blank ...
Page 116: ...Section 4 4 41 Intentionally Blank ...
Page 119: ...Repairs 4 44 Notes ...
Page 120: ......