15H pump and motor service manual
single pump disassembly
Remember dirt is the enemy of any hydraulic system.
The best way to fight this enemy is to prevent its entry
into the system. Make sure you disassemble and
reassemble this pump in spotlessly clean surroundings.
Apply a coating of grease (cup grease consistency) to
surfaces of all "O" rings and oil seals to facilitate
positive location as they are installed in a reassembly.
DISASSEMBLY BY SUBASSEMBLY
Index mark the port end cover (38), gear
housing (26) and shaft end cover (9) to facilitate
Remove the four cap screws (39) from the port
end cover (38).
Lift off port end cover (38); the thrust plate (28)
with pocket seals and the roller bearings (37,
40) will also be removed in this operation.
Remove the driven gear (32).
Remove the gear housing (26) and drive gear
(23) from the shaft end cover (9). Be sure to
keep gears together as they are a matched set.
SHAFT END COVER
Turn the shaft end cover (9) over so that the
drive end of the shaft is facing up. With a
screwdriver remove the snap ring (1) then
remove the bearing shield (2) and bearing seal
Pull the drive shaft (6) from the shaft end cover.
The shaft ball bearing (4) will also be removed.
Then lift out the bearing spacer (7).
Remove and discard the oil seal (8) from the
shaft end cover.
Turn the cover over so that the thrust plate is
up. Pry off thrust plate (22) carefully with a
knife blade or thin screwdriver. Remove and
discard the pocket seals (20), (21).
Pull the bearings (19, 33) with a bearing puller
from the shaft end cover (9)-ONLY-if they) are
Remove the check valve assemblies (34, 35,
Remove the shaft "O" ring (18) and the back-up
rings (17) from shaft end cover (9).
Remove key (5) and press bearing (4) from
Remove and discard "O" rings (24, 27) from
grooves in housing (26).
PORT END COVER
Pry off the thrust plate (28) with a knife blade or
thin screwdriver. Remove and discard the
pocket seals (29), (30).
Pull the bearings (37, 40) with a hearing puller
from the port end cover (38)-ONLY-if they are
Commercial Shearing, Inc. 1964