Page 11-2 MAXX 450D/470D/Diesel
HydraMaster Corporation
1/18/00
OPERATIONAL MAINTENANCE (cont.)
WEEKLY
1. One time change of oil and oil filter after first 20 hours of use.
2. One time check of the belt tensioning after first 25 hours of use.
3. Check the oil level in blower.
4. Check the high pressure pump oil. Add as necessary.
5. Check the drive system screws. Tighten as needed.
6. Check the pump drive belt for wear.
7. Check the pump pulleys for wear.
8. Check the high pressure water lines for wear or chafing.
9. Check all nuts and bolts. Tighten as needed.
10. Clean foam element in air cleaner.
11. Inspect vacuum relief valve. Clean and lubricate as necessary.
12. Clean vacuum tank thoroughly with high pressure washer.
13. Check the wiring for any chafing.
14. Flush water and chemical system with 50/50 white vinegar solution.
15. Check float switches for debris.
MONTHLY
1. Change the engine oil regularly.
2. Clean the engine air cleaner filter.
3. Remove pressure Bypass Valve piston plate. Grease plate. Reinstall.
4. Check water level in the battery. Clean connections as needed.
5. Clean incoming adapter filter.
6. Clean the water box solenoid filter.
7. Clean control orifice and secondary orifice filters.
8. Inspect the primary and the secondary orifice.
9. Change the oil filter every 2 months.
10. Inspect the radiator and hoses every 2 months.
11. Check the belt tensioning every 2 months.
The poly-chain drive system is approx. ¼” deflection with 8 to 9 lbs
of force, measured at midspan.
3/30/00
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