11
PUMP MOUNTING LOCATIONS
Pump mounting varies with each application and
pump used. Mounting options include mounting
directly to the PTO or to the transmission. Ensure
you are using the correct PTO ratio so the pump
operates at the correct rpm.
CAUTION!
FAILURE TO PROPERLY ISOLATE THE PUMP
FROM
THE
CHASSIS
MAY
RESULT
IN
UNWANTED NOISE AND/OR DAMAGE TO THE
PUMP SHAFT.
PTO DIRECT MOUNTING
When mounting the pump directly to the PTO you
MUST lubricate the pump and PTO splines. Failure
to do this will cause premature spline failure
(fretting).
Most PTOs limit the weight on the flange to 40 lbs.
Most of our pumps weigh more than this limit. To
avoid damage to the PTO, secure the rear of the
pump to the vehicle’s transmission case with a
triangle brace. While the brace must not exceed 1/8”
thick under the pump bolt, the remainder of the
bracket should be sufficiently thick to support the
pump. Torque the pump bolt and the transmission
case bolts as specified in the transmission service
manual.
TRANSMISSION MOUNTING
Before mounting the pump to the transmission,
obtain approval from the manufacturer. Verify the
extra weight does not exceed the recommended stress
on the transmission. In most cases, a pump-mounting
bracket can be built to fasten to the bolt pattern off
the rear of the transmission.
In some cases there is no room for a direct mount and
the pump will need to be mounted onto the chassis
using an “L” bracket such as the one in the figures b7
and 8. When driving the pump via drive shaft, design
the “L” bracket with consideration of pump
harmonics and the usage of vibration isolators.
Figure 6: Pump Mounting L-Bracket Front View
Figure 7: Pump Mounting L-Bracket Rear View
It is important to follow good driveline installation
practices:
•
Maintain drive shaft angularity within 5-8
°
.
•
Maintain phase relationship between end
yokes.
•
Allow slip movement in shaft make up.
•
Ensure shafts are parallel within 1.5
°
.
Proper installation techniques for the drive shaft,
PTO, clutches, or other mechanical means of driving
the hydraulic pump must be followed. Consult the
factory or authorized distributor of the device for
installation assistance.