Operator’s Manual Backhoe Series BH - Page 53 of 91 - Version 2.0
7.2 Preventive Maintenance
Regular hydraulic system inspection is in everyone's interest; downtime due to overdue
maintenance is always more expensive.
◼ Scheduled inspections at set times after a certain number of hours of operation, checking
crucial components preventively, can avoid costly repairs and downtime.
◼ To avoid skipping certain parts, a good practice is to follow the direction of the oil. Starting at
the reservoir.
Maintenance schedule
See Section 7.6 Lubrication.
Gearbox for hydraulic pump
Hydraulic oil and filter:
7.3 Bleeding Backhoe Hydraulic System
If the hydraulic hoses are disconnected from the Backhoe or tractor, all trapped air must be
removed after the hoses are connected.
Start the tractor engine and operate the Backhoe through all movements several times to purge
the system of air.
Hydraulic System Hoses
Locate all oil leaks in the pressure side of the system, and inspect the external surfaces of the hoses
and fittings.
◼ Check the return side of the system for leaks by examining the oil in the reservoir. If air is
drawn into the system, the oil will contain air bubbles and appear to foam.
◼ When tightening connections, always use two correct size wrenches.
• IMPORTANT: Do not over-tighten fittings. Make them just tight enough
to eliminate leaks.
• NEVER use Teflon tape on pipe thread fittings. Always use a paste-type
sealer.
◼ Hoses on any Backhoe are very severely worked and will fail in time. Examine them regularly
and replace any that show signs of failure.
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