Gorman-Rupp Pumps 04E1-GA 1171927 and up - Manual (Page 25)

OM−03745 0 SERIES
MAINTENANCE & REPAIR PAGE E − 5
Due to the confined mounting location,
specialized equipment such as a transmis-
sion jack with custom brackets should be
used to lift and position the pump and
gearbox.
Close all valves in the suction and discharge lines.
Remove the pump casing drain plug (42) and drain
the pump. Clean and reinstall the drain plug using
Loctite Pipe Sealant With Teflon" or equivalent.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam-
age to equipment.
Disconnect the P.T.O. shaft from the gearbox drive
shaft. Remove all the hardware securing the pump
and gearbox to the vehicle chassis. Tie and tag the
any leveling shims used under the casing mount-
ing feet to ease reassembly. Move the pump and
gearbox to a clean, well-equipped shop for mainte-
nance and repair.
Suction Head and Wear Ring Removal
The wear ring (43) can be serviced by removing the
suction head (48). Remove the nuts (50) and pull
the suction head and wear ring out of the pump
casing. Remove the suction head gasket (51).
Inspect the wear ring for excessive wear or scoring.
The wear ring is secured in the suction head by a
press fit. If replacement is required, use a small bit
to drill two holes through the ring horizontally, 180
_
apart. Use a saw and chisel to complete the cuts
through the ring, and remove it from the suction
head. Use caution not to damage the suction
head bore when removing the ring.
Use caution not to damage the suction
head when removing the wear ring.
Impeller And Pump Casing Wear Ring
Removal
Immobilize the drive shaft (25) and remove the im-
peller nut (43). Be careful not to damage the drive
shaft.
Install three 1/4-20 UNC x 2-1/2 inch long cap-
screws (not supplied) in the tapped holes in the im-
peller. Use a suitable puller to remove the impeller
from the shaft. Use caution when removing the im-
peller; tension on the seal spring will be released as
the impeller is removed. Retain the shaft key (47).
Remove the impeller adjusting shims (22).
With the impeller removed, inspect the pump cas-
ing wear ring (39) for excessive wear or scoring.
The wear ring is secured in the pump casing by a
press fit. If replacement is required, use a small bit
to drill two holes through the ring horizontally, 180
_
apart. Use a saw and chisel to complete the cuts
through the ring, and remove it from the casing.
Use caution not to damage the pump casing bore
when removing the ring.
Use caution not to damage the pump cas-
ing when removing the wear ring.
Seal Removal and Disassembly
Remove the seal spring. Lubricate the pinion shaft
(46) adjacent to the seal, and work oil up under the
rubber bellows. Slide the rotating portion of the
seal off the shaft.
Use a pair of stiff wires with hooked ends to hook
the stationary element from the back side, and pull
the element and O-ring from the seal bore in the
pump casing.
Pump Casing Removal
If the oil seal (34), housing gasket (4), or O-ring (38)
require replacement, or if the gearbox is to be dis-
assembled, remove the nuts (37) and slide the
pump casing off the shaft. Remove the housing
gasket and O-ring.
Remove the bearing shims (35). Tie and tag the
shims, or measure and record their thickness for
ease of reassembly.