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1. Switch off the machine and disconnect power.
2. Remove the front cover.
3. View the hydraulic reservoir sight line.
4. If the fluid level is below the fill line on the side of the tank, remove the filler cap and add
fluid until it reaches the filler line. DO NOT OVERFILL!
5. Only use 100-weight hydraulic fluid. This can be ordered from Challenge in five-gallon
containers, part number S-1991-3. See Section 8.1.6 for a compatibility list. Do not use
transmission fluid. Transmission fluid will damage power unit.
6. Screw the filler cap back into the reservoir and replace the front cover.
8.1.5 Replacing Hydraulic Fluid
The hydraulic fluid should be replaced annually.
Use the following procedure to replace the hydraulic fluid:
1. Switch off the machine and disconnect main power.
2. Remove the front cover.
3. Remove the filler cap from the reservoir.
4. Use a transfer pump or syphoning tool to remove the used fluid from the reservoir.
Transfer pumps can be found at most hardware stores.
5. Refill tank to the fill line.
6. Replace the front cover.
7. Reconnect power to the machine.
Figure 16 – Hydraulic Reservoir Location
Do not replace the hydraulic fluid while it is hot. Severe burns may
result.
Disconnect the main power.
See Section 2.2 Power Lockout Procedure.
8.0 Appendix A - Maintenance Guide
21
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