6
NOTE: Changing shims under the bearing rest by .003’ will change
backlash on each gear by .0015” to .002” when reading directly
on the gear tooth. When using the ROTEX Backlash Kit, changing
shims by .003 will change backlash readings by .003” to .004”.
If both the upper and lower gear backlash readings must be raised
(or lowered), this can be done by changing the number of shims
on the pinion housing flange.
NOTE: Changing shims by .005 will change the backlash
reading on each gear by .001 when reading directly on the gear
tooth. When using the ROTEX Backlash Kit, changing shims by .005
will change each backlash reading by .002.
Make sure the weights are set, as described in Step 9 of the Drive
Head Final Assembly section, any time the pinion assembly is
removed and installed.
If difficulty is encountered in obtaining suitable clearances, it is
frequently because of the parts on the crankshaft have not been
pulled down tight or the bottom thrust bearing (53) is not seated
properly in the lower bearing rest casting (60). In addition, the
cover for the drive head housing should be down tight, and the
pinion shaft assembly must be all the way in place and the cap
screws down tight when taking measurements.
After the proper clearances have been set, make sure that the
drive head cover is bolted down tight, and that the pinion shaft
assembly is bolted tightly to the housing. Run lock wire through
the drilled heads of the cap screws installed in the pinion
shaft assembly.
DRIVE HEAD FINAL ASSEMBLY (CONTINUED)
1. Run lock wire through the 10 cap screws (79), holding the lower
bearing rest casting to the bottom of the drive head housing.
2. Bolt the oil pump assembly to the oil pump drive flange (56)
with four cap screws (75) and lock washers (74). Run lock wire
(76) through the drilled heads of the cap screws.
3. Apply Permatex Sealant on the threads of the oil drain plug
(87) and insert in the oil pump sump assembly (84). Install drain
plug (82) in housing (77).
4. Apply Permatex Sealant to the top flange of the oil pump sump
assembly (84) and install gasket (83) on the flange.
5. Fasten the oil pump sump (84) to the bottom of the drive head
housing by means of 10 cap screws (86) and lock washers (85).
6. Add four gallons (15.2 liters) of ISO grade 150 hydraulic oil to
the drive head and replace breather vent.
7. With the use of a crank arm, rotate the crankshaft until oil is
forced up by the oil pump through the center of the crankshaft.
Rotate the crankshaft in the opposite direction and again check
for oil flow. If there is no oil flow or oil flowing in only one
direction, check the oil pump for proper assembly.
8. Apply Permatex Sealant to the top flange of the crankshaft (17)
and place the gasket (16) and baffle plate (15A) in place.
9. Lower the crankpin assembly into place on the crankshaft
flange, and bolt into place with 12 cap screws (19) and lock
washers (18). Run lock wire through the drilled heads of the
cap screws.
10. Install the oil seal cap (107) with felt seal (102) and gasket (106)
on the pinion shaft and bolt in place with 10 cap screws (109)
and lock washers (108).
11. Install oil sight tube (93) and gaskets (92 and 94) and oil sight
tube cap (91) on inspection plate weldment (95) by means of
cap screw (88), flat washer (89) and clamp bolt gasket (90).
12. Place gasket (96) on the inspection plate weldment (95) and
install the inspection plate on the drive head housing with ten
cap screws (97) and conical lock washers (98).
INSTALLATION OF DRIVE HEAD ON MACHINE
1. Bolt the drive head assembly down tightly to the machine base.
2. Lower the box frame onto the crankpin (7).
3. Bolt the clamping sleeve (5) to the crankpin with eight cap
screws (4) and new 5/8” internal tooth lock washers. Make
sure that the mating surfaces of the clamping sleeve and the
crankpin bearing are in good condition to ensure a tight fit.
Run lock wire (3) through the drilled heads of the cap screws.
4. Install crankpin cover (2), crankpin cover bolt (1B) and grease
fitting (1A).
5. Reconnect the discharge end drag link assembly to the
box frame.
6. Install the ROTEX sheave (111), bushing (110) and key (120)
on the pinion shaft.
START UP OF MACHINE
Start the machine slowly, and check for excessive vibration.
If there is excessive vibration, recheck the balance weights to
make sure they are properly set. If there is no excessive vibration,
allow it to run for two to three minutes and check to observe a
continuous oil flow in the sight glass in the inspection port cover.
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