Service - H&S 3131 Operator's Manual

SHEAR BOLTS - Main Drive
The beater and the apron drive are protected by
one shear bolt located on the front end of the side
drive shaft (left side of spreader). Two spare shear
bolts are provided. Shearing of the bolts is normally
due to foreign objects in the manure or starting
the spreader PTO too quickly with high tractor
RPM's. Always use H&S shear bolts when
replacing shear bolts.
SHEAR BOLTS - Apron Drive
The worm gearbox and apron are protected by two shear bolts.
One on the driven high speed sprocket (A) and one on the
low speed sprocket (B). Two spare shear bolts are provided
(C). Shearing of these bolts is normally due to the apron
being frozen fast to the floor, or catching on frozen "chunks".
Occasionally the shear bolts will shear due to the spreader
being overloaded. Always determine the cause of failure, and
eliminate the cause before replacing the shear bolt, using H&S
shear bolts when replacing shear bolts.
NOTE: Normal apron speeds at 540 RPM are: low speed
4-1/2 fpm, high speed and clean out position 8-1/2 fpm. If the
apron is not moving at these speeds, especially in high or
clean out, check and replace the high speed shear bolt (A).
Failure to do so will result in serious damage to the
sprocket and shaft.
BEATER
When replacing beater paddles, the sharp edges of the teeth
must lead in the direction of beater travel. On the right half
of the beater the teeth must point to the right side of the
spreader. On the left half of the beater the teeth must point
to the left side of the spreader. Always use H&S special grade
5 bolts, washers, and nuts when replacing. Torque to 60
foot lbs.
WHEEL BEARING LUBRICATION, CLEAN & RE-PACK INSTRUCTIONS
Wheel hubs are equipped with a grease zerk for regular maintenance. Annually disassemble and
clean parts in solvent. Reassemble bearings per instructions in the Service Chapter and tighten the
castellated nut on the spindle to the point where there is no end-play and a slight drag on the bearings.
Replace the cotter key with a new one of the correct size, bend cotter pin over and re-install cap.

SERVICE

Spare Shear Bolts
Shear Bolt
-19-
Shields Removed for Clarity
A B
Shields Removed for Clarity
(Shown w/optional upper
beater for 3131/3137)
C