7. Place the outer geroter (65) and eccentric ring (66) into the
pump body (73).
8. Install housing cover (62) on the assembly and bolt together
with three cap screws (72). Run lock wire through the drilled
heads of the cap screws.
PINION SHAFT ASSEMBLY
1. Check that the pinion shaft key (118) is a tight fit in the
keyway of both the pinion shaft (119) and the pinion gear
(116). Wear in the key or keyways will require replacement of
the worn parts.
2. Press the inboard bearing (117) onto the end of the pinion
shaft (119).
3. Install the beveled pinion (116) on the pinion shaft (119) and
lock in place with key (118).
4. Bolt the bearing clamp plate (115) to the end of the pinion
shaft (119) with three cap screws (113) and lock washers (114).
Run lock wire (112) through the drilled heads of the cap screws.
5. Press the outboard bearing (98) into the pinion shaft
housing (122).
6. Press the pinion shaft (119) into the housing, from the pinion
end, through the outboard bearing (98).
7. Install lock washer (99) and lock nut (100) on the sheave end of
the pinion shaft and tighten against the outboard bearing.
8. Attach cap (101) to the pinion shaft housing with 5 cap screws
(104) and lock washers (103). Run lock wire (105) through the
drilled heads of the cap screws.
CRANKPIN ASSEMBLY
1. Hand pack the crankpin bearing (10) with grease.
2. Apply oil to the outer race of the bearing.
3. Press the bearing into the crankpin bearing housing using an
8¼ in. diameter x ½ in. thick (210 mm x 13 mm) steel plate so
pressure is applied to the outer race only. The bearing will stop
on a machined ledge in the in the housing.
4. Turn the crankpin upside down so the shaft is up.
5. Apply oil to the felt seal (8) and install it in the crankpin groove.
6. Lift the crankpin bearing housing and bearing over
the crankpin.
7. Press the housing and bearing onto the crankpin using
a 4¼” ID x 5¼” OD (108 mm ID x 133 mm OD) steel pipe.
Apply pressure to the inner bearing race only.
8. Install the snap ring (11).
9. Install the crankpin bearing spacer (13), spacer lock (14)
and screw (15).
10. Fill the space between the bearing and bottom of crankpin
housing with grease.
11. Install the crankpin bearing assembly to the drive weight using
12 cap screws (19) and new lock washers (18).
DRIVE HEAD FINAL ASSEMBLY
1. Install the lower bearing rest casting (60) into the bottom of
the drive head housing, and bolt into place with 10 cap screws
(79) and lock washers (78).
2. Place the shims (55) and the lower bearing support collar (54)
into the lower bearing rest casting. The lower bearing support
collar is held in place by a self-locking pin (61) in the lower
bearing rest casting.
NOTE: THE SAME THICKNESS OF SHIMS WHICH WAS
REMOVED FROM THE DRIVE SHOULD BE USED AS A
STARTING POINT IN REASSEMBLY.
3. Apply Permatex Sealant (33A) to top cover flange. Insert guide
pins in holes in housing used for bolting top cover in place.
Position gasket (37) in place over guide pins on housing.
4. Lift the crankshaft assembly by means of two hoists attached
to the two lifting rings in the top cover and suspend it in
an upright position. Tap downward on the outer edge of
the minor weight to ensure it is completely seated on its
bottom bearing.
5. Rotate the minor balance weight 180 degrees opposite of the
major balance weight and lock in place by forcing a wooden
wedge between the two bevel ring gears.
6. Lower the crankshaft assembly into the drive head housing
by means of two hoists attached to the lift rings. When the
top cover comes within six inches of the top of the drive
housing, insert guide pins through the top cover holes,
screwed into the top of the drive head housing. (See Step 3)
These pins will allow the crankshaft assembly to be lowered
into place with the flange holes in alignment.
7. Lower the crankshaft assembly into place, guiding the
spherical roller bearing (53) into the lower bearing rest
casting (60).
8. Bolt the cover (33) to the drive head housing (77) by means of
8 cap screws (31) and lock washers (32). Run a chain through
the two lifting yokes on the cover. Place a hydraulic jack on
top of the crankshaft and jack against the chain in order to
seat the bottom crankshaft bearing. While applying pressure
with the jack, tap lightly on the cover and underside of the
drive housing.
9. Remove the wooden blocks from the ring gears, and position
the balance weight as follows:
The two balance weights must be in their correct relationship.
The major balance is keyed to the crankshaft, and therefore is
always in correct position.
The minor balance weight is free to rotate and must be
placed in the proper position prior to engaging the pinion
and gears.
The positioning of the balance weights in the drive head will
depend upon the mounting of the drive head on the screener.
Figure 1 shows the correct positioning for each of the four
possible drive mountings.
To get the balance weights to move in the proper position,
lift the opposite side of the drive head housing and allow
the balance weights to swing into their correct position by
gravity. When the balance weights are in their proper position,
they should be locked in place by means of a wooden wedge
4
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