Allied H12E, Service Manual

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Section 1
1 - 1
General
Introduction
This service manual is for the H12E hydraulic winch. The
following information is included in this manual:
Section 1. General includes operation descriptions
of systems and components as an aid for
troubleshooting and repair.
Section 2. Troubleshooting lists common problems
and the possible causes and corrections.
Section 3. Maintenance provides a guide for
periodic maintenance, checks and adjustments.
Section 4. Repairs describes the removal,
disassembly and assembly of the winch.
Description
The H12E Winch is a Power Forward ( LINE-IN ) and Power
Reverse ( LINE-OUT ) winch. The winch is powered by an
internal hydraulic motor connected to the tractor hydraulic
system. Oil fl ow and pressure are converted to rotational
energy by the winch motor. Motor torque is transmitted
through a holding brake, a planetary speed reducer and
two gear reductions to the drum. Hydraulic oil is supplied
by the tractor mounted pump. The tractor provides
hydraulic power, fi ltration and cooling. Operation of the
winch is controlled by a control lever and a
BRAKE-OFF
switch located at the tractor’s control station.
The H12E winch BRAKE-OFF function permits the
wire rope to be pulled from the drum under increased
resistance.
The H12E winch has a maximum rated line pull capacity
of 150,000 lbs. (68,000 kg) when there is one layer of wire
rope on the drum. When there is more than one layer of
wire rope on the drum, the line pull is reduced.
Figure 1-1 H12E Winch
1
3
4
2
1
5
5
6
10
8
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6
10
11
7
NAMEPLATE
2
NAMEPLATE
2
2
12
12
1. Drum
2.
Access Cover for Motor and Hydraulics
3. Plug to Drain Oil
4. Plug to Check Oil Level
5. Tie Bar
6. Fill Plug
7. Bearing Retainer for Intermediate Shaft
8. Drum Shaft
9. Drawbar
10. Breather
11. Maintenance & Warning Decals
12. Serial Number Stamp