Hale Q Series Muscle - Manual (Page 31)

31 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Introduction 
Auto Lube
®
A patented centrifugal pump is
built into the shaft of Qmax,
Qmid, and Qtwo pumps. (See
Figure 2-11: “AutoLube Fea-
ture.”)
This pump continuously forces
oil from the reservoir, through
the bearing, and back again. A
balancing chamber, behind the
oil reservoir, maintains the pres-
sure in the oil reservoir equal to
water pressure – whether you
are pumping at high inlet pres-
sure or pulling vacuum.
The pump adds enough extra
pressure to maintain oil flow a
few PSI higher than water pres-
sure. Thus, oil pressure inside
the double lip-type seal is
always slightly higher than water
pressure outside. Dirt and water are repelled by this higher pressure.
Auto-Lube also ensures continuous lubrication, even when you are pumping dry. A
compact, double lip-type oil seal, and maintains a constant film of oil under this seal to
prevent shaft wear. AutoLube completely eliminates the need for a second set of
packing, or mechanical seals.
2.5 PUMP DRIVES
Midship pumps are normally driven through an integral transmission that has a sliding
gear shaft and sliding gear that selectively directs the engine power to the pump or
the rear axle.
Four common centrifugal pump drives are used:
 Operation from the truck chassis drive shaft (split-shaft gearbox)
Also see Table 2-1: “Pump vs. Gearbox / Gear Ratio Comparison” on page 32.
Figure 2-11: AutoLube Feature