14. Rotate pinion to desired position. Install and tighten six hex head cap screws (W) along with six flat washers (X)
and six lockwashers (Y).
15. If necessary, reposition plugs (AA), petcock (AC), and oil cup (AB). Oil cup should be at uppermost point and
petcock at second hole from bottom.
16. Refill with oil to level of petcock (AC) using Gulf Senate 375, Mobile 600 W Cylinder Oil, or AGMA No. 7
compounded oil.
LUBRICATION INSTRUCTIONS FOR INITIAL START-UP
The oil cup (AB) is shipped separately to prevent breakage. Before placing the gear reduction unit in operation, install the
oil cup (AB) and check the oil level in unit. The oil level should be maintained even with petcock (AC) at all times.
SERVICING INSTRUCTIONS
The oil should be clean and free from sludge at all times and should be changed at regular intervals. A drain plug (AA)
has been provided near the bottom of the gear case (44) for this purpose. The oil (Gulf Senate 374, Mobil 600 W
Cylinder Oil, or AGMA NO. 7 compounded oil) should be changed every 1000 hours or every four months, whichever
comes first. Where operating conditions are severe, such as rapid rise and fall of temperature, or the atmosphere is moist
or dusty, it may be necessary to change the oil every one or two months or sooner. The oil cup (AB) at the front of the
gear case (44) is for filling the unit with oil and also serves as a breather. DO NOT allow the oil cup (AB) to become
clogged. This could cause excessive pressure inside the gear case (44).
CHANGING RATIO OF GEAR REDUCTION UNIT
Refer to appropriate sectional drawing (Figure 7.2) showing internal construction of the gear reduction assembly. The
internal construction for all ratios are identical, except for the drive gear (46) and pinion shaft (42), which determines the
gear ratio of that particular unit. The drive gear (46) and pinion shaft (42) are interchangeable in pairs only. See GEAR
RATIO CHART for ratios available. It is recommended that new gaskets (38, 48) and new lip seal (39) be installed each
time unit is disassembled and reassembled.
1. Turn off pump and lock out energy source to driver. DO NOT proceed further with disassembly of gear reduction
unit if there is the slightest possibility that driver may be started.
2. Drain oil from gear reduction unit.
3. If unit is assembled on a baseplate, directly connected to a motor, it will be necessary to remove flexible coupling
as follows:
A.) Loosen setscrew on motor half of coupling.
B.) Slide motor coupling half towards motor to clear pump coupling half. (In case coupling cannot be removed in
this manner, it will be necessary to remove either motor or pump in order to remove pump coupling half.)
4. Loosen six hex head cap screws (W) and rotate gear case (44) in slots provided until pump coupling half is clear
of motor coupling half.
5. Remove pump coupling half.
6. Remove drive key (A). Remove four hex head cap screws (U) and four lockwashers (V). Slide seal retainer (37)
assembled with lip seal (39) off the end of pinion shaft (42).
7. Remove seal retainer gasket (38) between seal retainer (37) and gear case (44).
8. Remove pinion shaft (42) assembly with ball bearing (41) and retaining ring (40).
9. Remove six hex head cap screws (W), twelve flat washers (X), and six lockwashers (Y).
10. Remove gear case (44). Remove gear case gasket (48).
11. Remove retaining ring (45).
12. Remove drive gear (46). A gear puller may be necessary in removing gear, as a close fit is maintained between
gear and shaft.
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