HydraMaster Boxxer 423s - Maintenance Schedule Overview

5-3: Machine Maintenance Machine Maintenance: 5-2
Quarterly Maintenance
• Clean and gap the spark plugs to 0.030”. Replace if excessive carbon buildup is visible.
• Check fuel lter. Replace as necessary.
100 Hours
• Replace spark plugs every 100 hours.
• Change the blower oil after rst 100 hours of use.
250 Hours
• Check coupler element (rubber insert) for cracks or wear. Replace as necessary.
• Check the fuel lines every 250 hours. Repair or replace as needed.
• Check valve clearance, intake and exhaust 0.004 to 0.006” every 250 hours.
500 Hours
• Change blower oil every 500 hours.
• Change the high pressure pump oil every 500 hours.
• Change fuel lter every 500 hours.
• Check coupler element (rubber insert) for cracks or wear. Replace as necessary.
1,000 Hours
• Check plug wires. Replace as necessary every 1,000 hours.
• Check carburetor every 1,000 hours. Clean or replace as necessary.
• Replace coupler element (rubber insert).
• Clean heat exchanger core every 1,000 hours.
Refer to the Interval in Hours Maintenance chart in the Owner’s Guide for more
information.
OPERATIONAL MAINTENANCE
Daily Maintenance
• Check the engine oil level. Add oil if needed.
• Check the high pressure pump oil. Add oil if needed.
• Check the oil level in the blower. Add oil if needed.
• Inspect and clean the recovery tank lters.
• Inspect and clean the garden hose screen.
• Inspect the truckmount for water and oil leaks, loose electrical connections, etc. and
repair as needed.
• Lubricate the blower lube port with a HydraMaster-recommended lubricant,
P/N 000-087-006.
Weekly Maintenance
• Inspect the recovery tank lters for tears, holes, etc. Repair or replace as needed.
• Inspect the vacuum relief valve. Clean and lubricate as necessary.
• Clean the recovery tank thoroughly with pressure washer.
• Check the pump belt for wear and proper tension. Adjust as needed.
• Check all the hoses and wiring for wear and chang. Secure as needed.
• Flush the water and chemical systems with solution of equal parts white vinegar and
water.
• Check all the nuts and bolts. Tighten as needed.
• One time change of the high pressure pump oil after 50 hours of operation. (Every 500
hours thereafter.)
• One time change of the engine oil and oil lter after 5 hours of operation.
• Change the engine oil and oil lter every 50 hours. (Every 25 hours if operating in high
ambient temperatures.)
Monthly Maintenance
• Check the engine air lter. Clean or replace as necessary.
• Check the water level in battery. Fill as needed.
• Clean the battery terminals as needed.