Sierra Troubleshooting Guide
CONDITIONS
POSSIBLE CAUSE
CORRECTION
DRUM WILL NOT ROTATE WITH
NO LOAD
1. Winch not mounted squarely causing
end bearings to bind the drum.
2. Brake damaged.
3. Gears damaged.
1. Check the mounting. Verify it's
square.
2. Inspect and replace brake.
3. Inspect and replace damaged
gears.
DRUM WILL NOT ROTATE
UNDER LOAD
1. Load greater than rated capacity of the
winch.
2. Low hydraulic system pressure.
3. Winch not mounted squarely causing
end bearings to bind the drum.
1. Reduce load to less than the
rated capacity of the winch.
2. Check pressure.
3. Check the mounting. Verify it's
square.
WINCH RUNS TOO SLOW
1. Low flow rate.
2. Hydraulic motor worn out.
1. Check flow rate.
2. Replace motor.
DRUM WILL NOT FREESPOOL
1. Clutch not disengaged.
2. Winch not mounted squarely causing
end bearings to bind thedrum.
1. Disengage clutch.
2. Check the mounting. Verify it's
square.
BRAKE WILL NOT HOLD
1. Brake damaged.
1. Inspect and replace brake.
LOAD DRIFTS
1. Worn brake.
1. Overhaul the brake assembly.
CABLE BIRDNESTS WHEN THE
CLUTCH IS DISENGAGE
1. Drag screw improperly adjusted.
1. Adjust drag screw.
EXCESSIVE NOISE
1. Hydraulic system flow too high.
2. Drum in bind, winch not mounted
squarely.
1. Check flow rate.
2. Check the mounting. Verify it's
square.
DRUM CHATTERS in "REEL IN"
DIRECTION
1. Low hydraulic system flow.
2. Low hydraulic system relief pressure
setting.
1. Check flow rate.
2. Check relief valve setting.
CLUTCH DIFFICULT TO
ENGAGE
1. Detent screw damaged or improperly
adjusted.
1. Replace or readjust detent screw.
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914281 - 1016 - A
Summary of Contents for Sierra H8
Page 2: ...This page intentionally left blank 914281 1016 A 2...
Page 9: ...Hydraulic System Layout 9 914281 1016 A...
Page 35: ...Tie Bar Installation 1 Install the tie bars 7 with the capscrews 9 35 914281 1016 A...
Page 36: ...Assemblies and BOMs Main Winch 914281 1016 A 36...
Page 38: ...Brake Assembly Manual Shift 914281 1016 A 38...
Page 40: ...Gear Box Assembly Manual Shift 914281 1016 A 40...
Page 42: ...Brake Assembly Air Shift 914281 1016 A 42...
Page 44: ...Gear Box Assembly Air Shift 914281 1016 A 44...
Page 48: ...Dimensional Drawing Manual Shift 914281 1016 A 48...
Page 49: ...Dimensional Drawing Air Shift 49 914281 1016 A...
Page 50: ...This page intentionally left blank 914281 1016 A 50...