H&S GM 170, Operator'S Manual And Parts List

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SERVICE
MIXING AUGER & TUBE
The mixing auger should be centered inside the tube at all times. Adjustment bolts are provided on the 4
supports which hold the tube for aligning and centering it around the auger. Access to the adjustment
bolts and removing the mixing auger is gained through the tank lid opening in the top of the tank. The
auger can be removed as follows:
SHEAR BOLTS
Main Shear Bolt
The main shear bolt located on the driven sprocket on the front end of the transmission drive shaft,
protects the drive shaft, transmission and mixing auger. If the shear bolt fails, the transfer auger and
mixing auger will also stop rotating. In case of an overload, the head of the bolt will shear off and stop
shaft rotation. To replace the main shear bolt, proceed as follows:
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1. Disengauge the PTO, shut-off tractor and remove
key.
2. Open the tank lid, loosen the bearing set collar and
remove the bearing from the auger shaft.
3. Remove the top bearing bracket from the tank
cover.
4. Remove the 2 paddles from the auger.
5. Remove the 4 supports from the tube.
6. Remove the tube and then the auger through the
tank lid.
To replace the mixing auger or install a new auger, reverse the procedure of removal. After all components
are replaced, the tube must be correctly centered around the auger and tightly secured.
IMPORTANT: Use only a 5/16 x 1: grade 5 shear bolt.
1. Disengauge the PTO, shut-off tractor and remove key.
2. With the shifter pin engaged, rotate the mill/blower sheave
by hand to align the keyhole in the sprocket with the slot in
the shear flange. After proper alignment is obtained,
disengage the shifter pin.
3. Turn the lock nut on the shear bolt flush and insert the bolt
head through the keyhole and into the slot. Move the bolt
down into the narrower portion of the keyhole.
4. Tighten the lock nut to fix the bolt position.
5. Grease the fitting on the sprocket to prevent the mechanism
from seizing.
IMORTANT: Remove the cause of the shear bolt failure before resuming operation. Grease the fitting on
the sprocket any time a bolt is sheared.