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340 REV.030926
SERVICE INSTRUCTIONS
GENERAL:
Before attempting disassembly of the PULLMASTER Model PH136 Planematic drive, 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 Planematic seal kit (Part No. 23141) and, if the hydraulic motor has to be serviced, a motor
seal kit (Part No. 23117) on hand before the unit is taken apart. If working on the hydraulic motor, two new roller
bearings item 875, (Part No. 25352) are also required.
NOTES:
1)
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.
2)
Teflon seals item 887, are included in the motor seal kit. Teflon seals are not required if thrust
plates item 885, are not grooved.
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 Planematic assembly, should be carefully inspected for wear
and damage. Thoroughly clean parts before reassembly. Do not use solvent to clean the brake friction plates.
During reassembly, lubricate all O-rings and oil seals before installation.
In the following service instructions, reference to parts is made by number 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 Planematic drive. There are no special tools needed for 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:
Refer to PARTS REFERENCE on page 26 and MOTOR GROUP drawing G1078 on page 27.
1) Remove eight hex capscrews item 951, together with lockwashers item 953, from motor assembly.
NOTE:
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 bearings item 875, and ring seal
item 877. Thrust plate item 885, and dowel pins item 865, may stay in gear housing.
3) If thrust plate comes off with end cover, carefully pry it off of bearings item 875, and discard pocket seals item
887.
4) Remove gear set item 881, which consists of two gears which are a matched set.
5) Carefully pry gear housing item 861, off of motor adaptor item 800. Thrust plate item 885, and dowel pins
item 865, may stay in gear housing.
6) If thrust plate stayed on motor adaptor, carefully pry it off of bearings item 875, and discard teflon seals item
887.
7) Discard gasket seals item 869. It is also advisable to replace ring seals item 877, at this time. Bearings
item 875, have to be removed to allow access to ring seals.
