Rem GrainVac VR12 - Drum Drive Belt - Checking, Tensioning, & Replacement; Rotor Drive Belt - Checking, Tensioning, & Replacement

5. MAINTENANCE REM - GRAINVAC VR12
5.4. M
AINTENANCE PROCEDURES
56 9000-00-0042 R3
5.4.3. Drum Drive Belt – Checking, Tensioning, & Replacement
Check the belt for any signs of wear. As detailed below, ensure that the sheaves and
idler are properly aligned and check the belt tension.
When the drum drive belt needs replacing, proceed as follows:
1. Disconnect the PTO shaft from the tractor.
2. Open the front guard.
3. Loosen the drum idler bracket.
4. Remove the belt and replace with an equivalent belt.
5. Check for pulley alignment by laying a straight edge along the sides of the pulleys. A
pulley face that is out by more than 1/16” (1.6 mm) should be realigned.
6. The belt tightness should be checked with a straight edge and a fish scale on the
slack side of the belt at the approximate center location. The belt should be
deflected 1” (25 mm) from the straight edge. Fish scale reading should be in the
range of 4 – 5 lb (1.8 – 2.3 kg) at 1” (25mm) deflection. If using a belt tension meter,
the same 1” (25 mm) deflection measurement should be used.
7. To retighten, place a 3/8” socket wrench into the square hole in the back plate of the
drum idler bracket and tighten the belt. While still holding onto 3/8” socket wrench,
tighten the nut on the bolt in the adjustment slot.
8. Close the front guard and secure the latch.
5.4.4. Rotor Drive Belt – Checking, Tensioning, & Replacement
If the operator notices a decrease in capacity, a squealing sound, or the smell of rubber
burning, the belt tension must be checked as detailed below in step 7. Check the belt for
any signs of wear. Ensure that the sheaves and idler are properly aligned as detailed
below.
If this belt needs replacing, proceed as follows:
1. Disconnect the PTO from the tractor.
2. Remove all the hoses from their holders.
3. Remove the rear guard and lower rear guard.
4. Remove the idler tightener, nuts, and spring.
5. Remove the rotor drive belt and replace with a new drive belt (see Figure 5.6).
Ensure the belt is fully seated in both pulleys.