3-10
AB62 Work Platform - European
M
AINTENANCE
Section
3.9
3.9 S
ETTING
H
YDRAULIC
P
RESSURES
Figure 3-14 shows complete hydraulic manifold
assembly.
NOTE: Check hydraulic pressures whenever the
pump, manifold, or any relief valve has been
serviced or replaced.
High Flow Relief Valve (#5)
1. Operate the hydraulic system 10-15 minutes to
warm the oil.
2. Install a 0-3000 PSI pressure gauge to the pres-
sure test port #3-using Part # 063965-002, Quick
Disconnect Adapter.
3. Retract boom completely.
4. While activating the boom retract function, set the
pressure to 186 bar (2700 PSI) maximum by
slowly turning the adjusting screw. Turning the
adjusting screw clockwise increases pressure;
counterclockwise decreases pressure.
5. Remove the pressure gauge, and reinstall all
plugs.
Low Flow Relief Valve (#9)
1. Operate the hydraulic system 10-15 minutes to
warm the oil.
2. Install a 0-207 bar (0-3000 psi) pressure gauge to
the pressure test port.
3. Completely extend jib function.
4. Continue activating function and set the pressure
to 97 bar (1400 psi) by slowly turning the adjust-
ment screw. Turning the adjusting screw clock-
wise increases pressure; counterclockwise
decreases pressure.
5. Remove the pressure gauge, and reinstall all
plugs.
Counterbalance Relief Valves
1. If any counterbalance relief valve is faulty, com-
pletely lower the jib, and retract the boom.
2. Replace or recalibrate the counterbalance valve.
3. Slowly cycle function related to replaced counter-
balance valve several times to remove air from
the system.
Содержание ab62
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Страница 61: ...AB62 Work Platform European 5 5 SCHEMATICS Section 5 1 Notes ...
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Страница 111: ...Page 6 41 Illustrated Parts Breakdown Control Module Assembly AB62 Work Platform European ...
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