Spearhead TWIGA
320/420
30
30
30
30
Hydraulic Hoses
Hydraulic Hoses
Hydraulic Hoses
Hydraulic Hoses
•
Carefully check condition of all hoses during routine service paying particular
attention to chafed outer casing. Secure wrap with waterproof adhesive tape
to stop the metal braid from rusting.
•
Daily inspect all hydraulic hoses and fittings to be in good order. Any
damages or leaks must be rectified immediately; this is part of the daily
maintenance and is your responsibility, to unsure a long reliable working life.
•
Hoses with damaged metal braid should be replaced.
•
When replacing hoses quote number stamped on fitting at one end. The
Spearhead hydraulic system works at very high pressure, when replacing
hoses use only genuine hoses, a burst hose could be very dangerous.
•
When replacing hoses to avoid twisting fitting, use two spanners to slacken
and tighten
•
Always check the yellow protective sleeve is in good order, to replace sleeve
is far cheaper than replacing expensive hoses.
•
Hose warranty is limited to replacement of hoses due to faulty materials or
manufacture Warranty will not be considered on hoses damaged by chafing,
abrasion, cuts or pinching while in work, or to damaged threads due to over
tightening.
•
All hose connections are of a “Parker” soft seal type and only need 1/2 a turn
more than finger tight to become leak-proof (see table below).
BSP
(Size
Tightening
(Nm)
Torque
(Ibsf/ft)
¼”
24
18
3/8’’
33
24
1”
115
85
Warning
Hose is weakened when installed in twisted position. Also,
pressure pulses in twisted hose tend to fatigue wire and loosen
fitting connections. Design so that machine motion produces
bending rather than torsion.
