Allmand Brothers Allmand 7.5 FT BACKHOE - Manual (Page 12)

12
SERVICE
CAUTION: To avoid possible injury,
observe the following safety rules when
servicing backhoe.
ƒ Do not oil, grease or adjust backhoe while it is in
motion.
ƒ Do not change any backhoe relief valve settings.
Relief valve settings are factory set for best backhoe
performance and safety.
ƒ Escaping fluid under pressure can have sufficient
force to penetrate the skin and cause serious injury.
Be sure to relieve all pressure before disconnecting
lines. Be sure all connections are tight and that lines,
pipes and hoses are not damaged before applying
pressure to the system.
ƒ 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.
ƒ See a doctor at once if injured by escaping fluid.
Serious infection or reaction can develop if proper
medical treatment is not administered immediately.
ƒ 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
ƒ Remove all protective covering. Remove excessive
grease from cylinder rods if unit has been in long term
storage.
ƒ 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.
ƒ Lubricate all grease fittings and oil handle linkage.
ƒ Clean and inspect all safety and operation decals.
Replace missing or damaged decals.
ƒ Replace oil filter.
ƒ Fill hydraulic fluid to proper level.
ƒ Tighten all loose bolts, nuts and set screws (See
torque chart page 4).
ƒ Sharpen or replace worn bucket teeth.
ƒ Operate backhoe slowly for a short time before placing
unit under full load.
ƒ Fully cycle backhoe through all movements several
times to purge air from the system.
HYDRAULIC HOSES
WARNING: Escaping hydraulic fluid under
pressure can penetrate skin causing serious
injury.
ƒ DO NOT use your hand to check for leaks. Use a piece
of cardboard or paper to search for leaks.
ƒ Stop engine and relieve pressure before connecting or
disconnecting lines.
ƒ 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 over tighten 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 from first two threads of
tapered end to prevent contamination of hydraulic fluid.
Do not use sealant on o-ring or flare adapter threads.
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.