39
HYDRAULIC HOSES
The condition of all hoses should be carefully checked during routine service of the machine.
Hoses that have been chafed or damaged on their outer casing should be securely wrapped
with waterproof adhesive tape to stop the metal braid from rusting. Hoses that have suffered
damage to the metal braid should be changed at the earliest opportunity.
Hose replacement
a)
Replace one hose at a time to avoid the risk of wrong connections.
b)
When the hose is screwed to an additional fitting or union, use a second spanner on the
union to avoid breaking both seals.
c)
Do not use jointing compound on the threads.
d)
Avoid twisting the hose. Adjust the hose line to ensure freedom from rubbing or trapping
before tightening hose end connections.
Before changing hoses study the installation these are carefully calculated to prevent hose
damage during operation. Always replace hoses in exactly the same manner. This is
especially important for the flail hoses where they must be crossed, upper to lower, at the
dipper and head pivots. The 90-degree elbows at the head bracket must point directly across
the pivot and the hoses must have no slack at this point.
Two hose clips are provided at either end of the large bore suction and return hoses - these
should be positioned so that their worm drive barrels are opposed at 180° to reduce the
possibility of air entering the system.
Hose warranty
Warranty is limited to replacement of hoses that have failed due to faulty materials or
manufacture. Warranty will not be considered on hoses that have suffered damage by
abrasion, cuts or being pinched or trapped while in work. Neither will a claim be considered
where a hose end has been damaged by a blow or where overtightening has damaged the
threads or unions.
Gearbox
The gearbox is rigidly bolted on to the main frame and has a filler plug. Oil level is correct
when level with the filler plug aperture. The gearbox oil (SAE80/ISO100) should be changed
every year or at 600-hour intervals -
whichever occurs first.
The capacity of the gearbox is 0.5 Litres.
Summary of Contents for PA 48
Page 1: ...PA 48 HEDGE GRASS CUTTER Operator Manual Publication 469 December 2004 Part No 41570 69...
Page 2: ......
Page 4: ......
Page 12: ...3...
Page 32: ...ELECTRIC MONOLEVER CONTROLS PROPORTIONAL ELECTRIC CONTROLS 23...
Page 41: ...ROLLER POSITION 32...
Page 42: ...HEDGE CUTTING SEQUENCE 33...
