Specifications

Maintenance
6-6
MORRIS Industries Ltd.
Trip Maintenance - Continued
400 Spring Cushion Trips
Spring Rod Pivot Pin Bushing Replacement
A simple check can be performed to see if the
bushings need replacing.
The bushing is visible when looking at the spring rod
pivot pin from the R.H.S. for the 400 trip unit.
In the event the pivot pin nylon bushings need
replacing, the following procedure can be used.
• Loosen spring retaining bolt.
• Slide two wrenches with a combined thickness of
at least 1” between the trip top and the washer on
the bolt.
• Tighten bolt fully, this will lift the casting off the
base.
• Pry the casting away from the spring rod pin. The
casting will drop down and the bushings can be
easily accessed.
• Replace the bushing.
Reverse the above procedure to reassemble trip.
Note: The head of the spring pin must be
orientated correctly with the slot in the
spring rod for correct assembly - square
shoulder enters the square ended slot.
Note: Torque spring retaining bolt to 75 ft. lbs.
once trip is reassembled.
IMPORTANT
Re-torque bolts after initial 50 hours.
Check tightness periodically thereafter.
Torque Bolts to 75 ft. lbs.
DANGER
Care must be taken when replacing any trip
components as the spring is under pressure.
Torque to
75 ft.lb. (102 Nm)