Group 3 Tests And Adjustments - Hyundai HL955 Manual

GROUP 3 TESTS AND ADJUSTMENTS

1. HYDRAULIC OIL CLEAN UP PROCEDURE USING PORTABLE FILTER CADDY
※
Service equipment and tool
·Portable filter caddy
·Two 4000 mm × 1in 100R1 Hoses
·Quick disconnect fittings.
·Discharge wand
·Various size fittings.
※
Brake system uses oil from hydraulic oil
tank. Flush all lines in the brake, pilot,
steering system and cut off system.
D i s a s s e m b l e a n d c l e a n m a j o r
components for brake and steering
system. Remove and clean pilot caps
from main control valve.
Brake and steering components may fail
if brake and steering system is not
c l e a n e d a f t e r h y d r a u l i c o i l t a n k
contamination.
1) If hydraulic system is contaminated due to
a major component failure, remove and
disassemble steering cylinders to clean
debris from cylinders.
2) Install a new return filter element. Inspect
filter housing before installing new element.
※
For a failure that creates a lot of debris,
remove access cover from hydraulic oil
tank. Drain and clean hydraulic oil tank of
fill the specified oil to hydraulic oil tank
through upper cover.
3) To minimize oil loss, pull a vacuum in
hydraulic oil tank using a vacuum pump.
Connect filter caddy suction line to drain
port at bottom of hydraulic oil tank using
connector. Check to be sure debris has not
closed drain port.
4)
Put filter caddy discharge line into hydraulic
oil tank filler hole so end is as far away from
drain port as possible to obtain a thorough
cleaning of oil.
6-52