MAINTENANCE
CAUTION: To avoid possible injury, observe the following safety rules when servicing backhoe.
•Do not oil, grease or adjust backhoe while it is in motion.
•Do not change any backhoe relief valve settings. Relief valve settings are factory set for best backhoe performance and safety.
•Escaping fluid under pressure can have sufficient force to penetrate the skin and cause serious injury. Be sure to relieve all presure before disconnecting lines. Be sure all connections are tight and that lines, pipes and hoses are not damaged before applying pressure to the system.
•Fluid escaping from a very small hole can be almost invisible. Use a piece of cardboard or wood - not your hands - to search for suspected leaks.
•See a doctor at once if injured by escaping fluid. Serious infection or reaction can develop if proper medical treatment is not administered immediately.
•Protect your eyes - wear safety glasses. Guard against injury when driving connecting pins or performing any repair in which particles can chip from work piece or striking tool.
BEGINNING OF SEASON
Remove all protective covering. Remove excessive grease from cylinder rods if unit has been in long term storage.
Check hydraulic hoses for deterioration and replace if necessary. Caution, hydraulic hoses may be under pressure. Make sure pressure has been relieved before removing hoses.
Lubricate all grease fittings and oil handle linkage.
Clean and inspect all safety and operation decals. Replace missing or damaged decals.
Replace oil filter.
Fill hydraulic fluid to proper level.
Tighten all loose bolts, nuts and set screws (See Torque chart).
Sharpen or replace worn bucket teeth.
Operate backhoe slowly for a short time before placing unit under full load.
Fully cycle backhoe through all movements several times to purge air from system.
HYDRAULIC HOSES
WARNING: Escaping hydraulic fluid under pressure can penetrate skin causing serious injury.
•DO NOT use your hand to check for leaks. Use a piece of cardboard or paper to search for leaks.
•Stop engine and relieve pressure before connecting or disconnecting lines.
•Tighten all connections before starting engine or pressurizing lines.
•Oil leaks on the suction side will draw air into the system, causing oil in reservoir to appear foamy.
•When tightening connections, always use two wrenches.
IMPORTANT: Do not overtighten fittings. Make them just tight enough to eliminate leaks.
NOTE: Apply sealant only to all tapered threads unless coupled with swivel adapters. When using teflon tape, wrap tape clockwise (as viewed from end) and wrap tape only twice. Keep sealant away front first two threads of tapered end to prevent contamination of hydraulic fluid. Do not use sealant on
Hoses on backhoe are very severely worked and will fail in time. Examine them regularly and replace any that show signs of failure. Pay careful attention to routing of hoses so they can move freely, without kinking and cannot be pinched or cut by any part of backhoe.
HYDRAULIC SYSTEM RESERVOIR
Maintain reservoir fluid level at 1 inch below tank top when bucket is extended to full reach, bucket rolled back for loading and resting on the ground, and stabilizers fully raised. If reservoir is overfilled, fluid may be forced out of breather cap.
Fill with SAE 10 engine oil with API”SD” classification in northern climates and SAE 40W engine oil with API”SD” classification in southern climates.
Change oil and filter every 200 hours or more often if necessary.
MAINTENANCE
Maintenance Section |
© 2011 Alamo Group Inc.