Timberwolf TW 230HB, Instruction Manual, Page: 48 / 64

6.12 Change Hydraulic Oil and Filter
Use plastic gloves to keep oil off skin. Dispose of used oil and filter in an ecologically
sound way.
1. Ensure the chipper is in a safe condition. (Refer to Section 6.1 "
Safe Maintenance" on
page 35.)
2. Ensure the chipper is level.
3. Clear all debris from around the hydraulic
tank (Figure 26).
4. Remove the black screw cap from the top of
the filter housing.
5. Partially remove the filter element from the
inner cup and leave for 15 minutes to drain.
6. Remove the filter element from the cup.
7. Remove the drain plug and drain the oil into
a suitable container.
8. Replace the drain plug.
Figure 26 - Hydraulic Tank
9. Refill with hydraulic oil VG32 to between the 'Min' and 'Max' lines on the tank (15 litres)
(Figure 26).
10. Refit the filter cup, with a new filter element, and refit the black screw cap. (Ensure the
O-ring seal stays in place.)
N.B. Use of the incorrect grade of hydraulic oil will cause running issues and block the
filters.
6.13 Check Hoses
The hydraulic roller system operates at extremely high pressures and must be maintained
in a safe working condition. All the hydraulic hoses should be regularly inspected for any
signs of damage, chafing or leaks.
The hoses that run to the top motor have the highest chance of damage as they are
constantly moving.
If any hydraulic components are changed, new seals should be used on re-assembly and
all fittings should be re-tightened.
46/61 C190-0304 - Rev 1.0 EN
TW 230HB (Petrol) 6 Maintenance Instructions