Gorman-Rupp Pumps 04E1-GHH 1076270 and up - Manual (Page 40)

OM−03688 0 SERIES
MAINTENANCE & REPAIR PAGE E − 15
NOTE
After the impeller has been properly positioned,
check for free rotation. Correct any scraping or
binding before further reassembly.
With the correct thickness of impeller adjusting
shims installed, apply Loctite Primer Grade T" to
the keyway, key (12) and shaft threads. Apply Loc-
tite No. 242" to the key and keyway and install the
key. Align the impeller and press it onto the shaft
until fully seated.
NOTE
It is not recommended that substitute locking mate-
rials be used in this application. Use
only the rec-
ommended Loctite" products.
After the impeller is installed, secure the impeller by
torquing the impeller nut (23) to 125 ft. lbs. (1500 in.
lbs. or 17,3 m. kg.).
Suction Head and Wear Ring Installation
If the wear ring (22) was removed, position the re-
placement ring in the suction head (24) with the
chamfered end toward the bore shoulder. Press
the wear ring into the suction head until fully
seated.
NOTE
The wear ring
must seat squarely in the suction
head; otherwise, binding and/or excessive wear
will occur as the shaft turns.
Apply Never-Seez" or equivalent compound to the
studs (27). Slide the suction head gasket (26) and
suction head over the studs, and secure with the
nuts (28).
Installing Pump and Gearbox
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.
Install the hardware securing the input and output
drive flanges (9 and 29) to the drive shafts. Install
the air lines from the air shift cylinder assembly on
the gearbox.
Install the hardware securing the gearbox to the
rear cross member. Install the hardware securing
the trunnion to the front cross member.
Connect the pump suction head and discharge
flange.
Final Pump Assembly
Open all valves. Make certain that all piping con-
nections are tight, properly supported and secure.
Be sure the gearbox has been properly lubricated,
see LUBRICATION at the end of this section.
Refer to OPERATION, Section C, and start the
pump.
GEARBOX DISASSEMBLY
Unless otherwise specified, the instructions in this
section are keyed to Figures 2 and 2A, and the ac-
companying parts lists.
When the pump is properly operated and main-
tained, the gearbox should not require disassem-
bly. Disassemble the gearbox only when there is
evidence of wear or damage.
Gearbox disassembly in the field is not rec-
ommended. These operations should be
performed only in a properly equipped
shop by qualified personnel.
Due to the confined mounting location of the
pump, it is recommended that the pump be re-
moved from the vehicle for service.
Due to the confined mounting location,
specialized equipment such as a transmis-
sion jack with custom brackets should be