HydraMaster Corporation
Page 4-2: Machine Maintenance
Boxxer 421
WEEKLY (cont.):
• Check pump pulleys.
• Check high pressure water lines for wear or chafing.
• Check all nuts and bolts. Tighten as needed.
• Inspect vacuum relief valve. Clean and lubricate as necessary.
• Clean vacuum tank thoroughly with high pressure washer.
• Check wiring for chafing.
• Flush water and chemical system with 50/50 white vinegar solution.
• Change engine oil (every 50 hrs.).
MONTHLY:
• Change oil filter (every other oil change).
• Check engine air cleaner filter. Clean as necessary.
• Remove pressure bypass valve piston plate. Grease plate. Reinstall.
• Check water level in battery. Clean connections as needed.
QUARTERLY:
• Check fuel lines.
• Clean and gap spark plugs.
• Check drive coupler for cracks or wear. Replace as necessary.
• Change oil in blower.
• Change pump oil.
• Grease blower bearing fittings.
500 HOURS:
• Replace plugs in the drive coupling, between the engine and the blower..
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