5. MAINTENANCE REM - GRAINVAC VR12
5.4. M
AINTENANCE PROCEDURES
52 9000-00-0042 R3
Greasing Procedure
• Wipe grease fittings with a clean cloth before greasing, to avoid injecting dirt and grit.
• Use a hand-held grease gun for all greasing.
• If fittings will not take grease, remove and clean thoroughly. Also, clean the lubricant
passageway.
• Replace or repair broken fittings immediately.
5.4. Maintenance Procedures
5.4.1. Shear Bolt – Replacement
The auger drive components are protected from damage by a replaceable shear bolt
(see Figure 5.1) in the shear sprocket assembly found on the input shaft of the gearbox.
This bolt can shear as a result of a foreign object jamming the auger. Therefore it is
important to determine the cause of shearing before replacing the shear bolt.
When the failure of the shear bolt is not noticed immediately, the GrainVac body may fill
with grain and cause the rotating drum screen to stall which could burn out the drum
drive belt. The drive belt should be checked for damage. If replacement is required, refer
to Section 5.4.3. Drum Drive Belt – Checking, Tensioning, & Replacement on page 56.
Shut down and lock out all power before maintaining, adjusting, or
unplugging the equipment.
To replace the shear bolt, proceed as follows:
1. Shut down the PTO, stop the tractor engine, and remove the PTO shaft from tractor.
2. Open the auger clean-out door at the bottom of the body. Check for foreign material.
Check to see that the middle auger section and the upper auger section rotate
freely.
3. Disconnect the grain hoses from the inlet so that more grain is not suctioned into the
body.
4. Open the chain guard.
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