16
CAUTION: DO NOT ATTEMPT TO CLEAN OR ADJUST THE MACHINE WHILE IT IS RUNNING.
Gearbox Drive Chains
When the gearbox drive chains are properly tensioned, they should deflect 1/2" from a straight line mid-way
between the sprockets. The chains are tightened with the chains tighteners, (A), Figure 17-1.
DO NOT OVERTIGHTEN THE CHAINS.
Apron Drive Shear Bolt
The apron drive is protected by a shear bolt 5/16-18 x 1.25" Grade 5, (B), Figure 17-1. Shearing of the bolt is usually due
to the apron being frozen to the floor, or the slats catching on manure frozen to the floor.
On MS125P spreaders, An extra shear bolt (5/16-18 x 2.5" grade 5) for drive shaft connecting to rear gearbox is carried in
the shield shown at (C), Figure 17-2. On MS175P and MS250P spreaders, extra shear bolts (5/16-18 x 2.5" Grade 5) for drive
shaft connecting to rear gearbox are carried in the shield shown at (D), Figure 17-3.
In some cases, the bolts will shear due to the spreader being overloaded. If the bolt shears, the drive hub can be
rotated counterclockwise until the bolt holes align. Always determine the cause of the failure, and eliminate
it before installing the new bolt. Use a genuine Pequea Machine Inc. shear bolt.
Maintenance
A
B
C
Figure 17-1
Figure 17-2
D
Figure 17-3