Gorman-Rupp Pumps 4D-X3 1P - Manual (Page 30)

D SERIES OM--01515
MAINTENANCE & REPAIR PAGE E -- 14
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the crankshaft gear key (8) in the shaft key-
way. Align the crankshaft gear teeth with those on
the pinion shaft, and press the gear onto the crank-
shaft until fully seated against the shoulder. Install
the spacer (31), and press the bearing (9) onto the
shaft until fully seated against the spacer.
Tap the end of the crankshaft with a soft-faced mal-
let to ensure that all components are fully seated.
If removed, press the pinion shaft bushing (13) into
the gear cover (7). Slide the pinion shaft washer
(12) onto the pinion shaft (28). Install the gear
housing gasket (4). Position the gear cover so that
the respective bores slip over the crankshaft bear-
ing and pinion shaft. Tap the cover into place with a
soft-faced mallet.
Install the two close-tolerance shoulder bolts (40
and 47) (which act as pilots to ensure accurate
concentric positioning of the cover) through their
respective holes, and secure them with the hard-
ware (41, 42, 48 and 49). Secure the gear cover to
the gear housing by tightening the remaining hard-
ware (37, 38, 39, 43, 44, 45 and 46) evenly.
Install the gear cover plug (14) and the gear hous-
ing plug (29).
Press the drive shaft and assembled bearings into
the eccentric housing (20), and secure with the re-
taining ring (24).
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Lubricate the lip of the oil seal (19) with light oil, and
position it on the drive shaft with the lip positioned
as shown in Figure 4. Press the oil seal into the ec-
centric housing bore until the face of the oil seal is
just flush with the face of the eccentric housing.
Be careful not to roll or cut the lip of the oil seal on
the shaft keyway.
Install the drive gear (25) on the drive shaft, and se-
cure with the snap ring (26).
Clean the mating surface of the eccentric housing
and replace the eccentric housing gasket (21). Po-
sition the assembled eccentric housing and drive
shaft in the gear cover bore with the word “top” on
the eccentric housing flange facing up. Slide the
housing and drive shaft into the gearbox, making
certain the drive gear teeth fully engage those of
the pinion gear. Secure the eccentric housing to
the gear housing with the hardware (15 and 16).
Install the drive shaft key (17).
(Figure 1)
Position the gearbox on the base (7). Position the
diaphragm ring (23) under the base, and secure
the gearbox and diaphragm ring with the hardware
(29 and 30).
If the drawbar (24) was removed, secure it to the
diaphragm ring with the U-bolts (35) and hardware
(36 and 37).
Secure the drive shaft coupling (1) to the drive
shaft. Check the coupling alignment as described
in
ALIGNMENT, Section B. Install the coupling
guard (4) and secure it with the hardware (19, 20,
21 and 22).
Lubricate the gearbox as described in LUBRICA-
TION.
Plunger Rod Reassembly And Installation
(Figure 3)
Slide the plunger rod (5) through the upper dia-
phragm plate (9). Slide the spring washer (11) and
spring (12) down over the plunger rod. Install the
spring retaining nut (13), and tighten it to obtain the
dimension shown in Figure 3.
Clean the bearing cap (1) with a cloth soaked in
cleaning solvent.
Most cleaning solvents are toxic and