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240 REV.980615
SERVICE INSTRUCTIONS
GENERAL:
Before attempting disassembly of the PULLMASTER Model M18 planetary winch, the following instructions for
disassembly and reassembly should be read and understood:
It is suggested that all expendable parts, such as O-rings and oil seals, are not reused on reassembly. It is therefore
important to have a seal kit (Part No. 23135) and, providing the hydraulic motor has to be serviced, a seal kit (Part
No. 23139) on hand before the unit is taken apart.
NOTE: Backup washers may be included with seal kit. Install with oil seals as per instructions. If not present
in seal kit, the oil seals supplied do not require backup washers.
A clean working area is of prime importance, similar to conditions used for service work on any other hydraulic component.
All parts, as they are removed from the winch assembly, should be inspected for wear and damage. Worn or
damaged parts must be replaced. Thoroughly clean parts before reassembly. Do not use solvent to clean the brake
friction plates.
During reassembly, lubricate all O-rings and oil seals with grease before installation.
In the following service instructions, reference to parts is made by numbers and shown on the applicable group drawings.
DISASSEMBLY
For the majority of required service or repair work, disassembly is required only on the brake housing of the
PULLMASTER Model M18 planetary winch. There are no special tools needed for the service or repair work
and no adjustments or calibrations are necessary. Proceed with the disassembly as follows:
DISASSEMBLY OF HYDRAULIC MOTOR ASSEMBLY:
If the analysed service or repair work requires access to the interior of the brake housing, the hydraulic motor should
not be disassembled. In this case, the hydraulic motor should be removed together with the motor adaptor as a
complete assembly. If a problem has been analysed to be in the hydraulic motor, proceed with the disassembly
as follows:
1) Remove the four hex capscrews, item 951, together with the lockwashers, item 953, from the motor assembly.
IMPORTANT: Failure to exercise care when removing the motor port end cover or gear housing could
permanently damage the machined surfaces of these motor components. Take care not
to damage machined surfaces of motor components at disassembly.
2) Remove (pry loose if necessary) port end cover, item 870, together with two bushings, item 875. Two dowel
pins, item 865, which are hollow for the capscrews to go through, will stay in either the port end cover or in the
gear housing, item 861.
3) Remove gear set, item 881, which consists of two gears which are a matched set.
4) As the gears are removed, so is a thrust plate, item 885, two end seals, item 887, two side seals, item 891,
and a backup seal, item 897. Discard end, side and backup seals.
5) Remove gear housing, item 861, together with gasket seals, item 869, and the remaining thrust plate with its
end, side and backup seals. Discard the gasket, end, side and backup seals.
End, side, backup and gasket seals in the hydraulic motor assembly are not part of the winch seal kit. The seal
kit for the hydraulic motor can be ordered from the factory under Part No. 23139. All parts of the hydraulic motor,
with the exception of the motor adaptor, item 800, and the port end cover, item 870, are standard parts of the
COMMERCIAL M365
hydraulic motor, having a 2.25 inch gear section. All of these parts can be ordered from
COMMERCIAL INTERTECH dealers in Canada, the United States and in most overseas areas. If there is no
COMMERCIAL INTERTECH representation, all parts for the hydraulic motor can be ordered from the factory.
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