WycoTool Hydraulic Paving Vibrators - Manual (Page 16)

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Wyco Tool Company
Once the rotor is engaged to the motor
housing, slide the head housing over the rotor
and begin to engage the threads.
Apply No. 2 Permatex on the motor housing
theads. Place the square head housing over the
rotor assembly and screw onto the motor
housing by hand until snug (right hand
thread).
Clamp the bracket in the pipe clamps of a vise
and tighten the head housing.
d) Hydraulic Motor Seal Replacement
The Wyco hydraulic motor will provide
thou sands of hours of life under normal
service conditions. However, if hydraulic oil
is contaminated or fluid temperature is not
maintained below 180° F, then premature
failure of motor shaft seals or motor efficiency
degradation will occur. If back pressure in the
return line is greater than 50 PSI, premature
failure of the motor shaft may occur.
If hydraulic oil is found in the square head
housing, the hydraulic motor seal has worn
and requires replacement.
If more than 5 GPM is required to turn 10,000
VPM and the oil temperature is 140° F or
less, then the hydraulic motor efficiency has
fallen below 80 percent and it should be
replaced.