Timberwolf TW 230HB, Instruction Manual, Page: 45 / 64

C190-0304 - Rev 1.0 EN 43/61
6.9 Adjust Rotor Drive Belt Tension
There will normally be a rapid drop in tension during the run-in period for new belts.
When new belts are fitted, check the tension every 2 - 3 hours and adjust until the
tension remains constant.
Too much tension shortens belt and bearing life.
Too little tension will cause poor performance, especially in respect of no-stress
devices.
Belt failures due to lack of correct tensioning will not be covered under your
Timberwolf warranty.
1. Remove the engine bay side panel.
Figure 22 - Tensioner Pulley Assembly
2. Use a 19 mm spanner to loosen the bolt in the
centre of the tensioner pulley until the pulley is
able to slide with minimal wobble (Figure 22,
Item 1).
3. Turn the nut on the end of the tensioner pulley
slider until the correct belt tension is achieved
(Figure 22, Item 2). (Refer to Section 6.11 "
V-
Belt Tensioning Procedure" on page 44.)
4. Tighten the bolt in the centre of the tensioner
pulley.
5. Run the machine then re- check the belt
tension.
6.10 Adjust Hydraulic Pump Drive Belt Tension
1. Remove the engine bay side panel.
Figure 23 - Pump belt adjustment
2. Loosen the two M10 bolts on the hydraulic
pump mounting pad (Figure 23, Item 1).
3. Loosen the M8 lock nut on the drive belt
tensioning bolt (Figure 23, Item 2).
4. Adjust the M8 tensioning bolt until the correct
belt tension is achieved. (Refer to Section 6.11
"
V-Belt Tensioning Procedure" on page 44.)
5. Tighten the M8 lock nut and the two M10 bolts
on the hydraulic pump mounting pad.
6 Maintenance Instructions TW 230HB (Petrol)