2-20 Published 08-25-09, Control # 077-04
HYDRAULIC SYSTEM RT9130E SERVICE MANUAL
*This setting is for Hoist “UP” and “DOWN” circuits.
NOTE: Procedures A through M in the following text
correlate with (Figure 2-7) through (Figure 2-16).
Procedure A - For Setting Main Directional
Control Valve Reliefs
1. Remove cap and install pressure gauge on the main
directional control valve load sense test port
(Figure 2-7).
2. Disconnect the hoist brake release line at the main hoist
(Figure 2-7). Cap tee fitting and plug hose.
3. With the engine running at full RPM, attempt to run main
hoist down, adjust the load sense relief in the main
directional control valve to 4800
± 50 PSI to (33.1 ± 0.4
MPa).
4. Completely retract the lift cylinder or disconnect and cap
the hose from the main directional control valve retract
port “A” to the lift cylinder. With the engine running at full
RPM, attempt to operate lift down, adjust the lift down
port relief in the main directional control valve to 27.6
±
0.4 MPa (4000 ± 50 PSI). Remove cap and reconnect
plumbing.
5. Completely extend the lift cylinder or disconnect and cap
the hose from the main directional control valve extend
port “B” to the lift cylinder. With the engine running at full
RPM, attempt to operate lift up, adjust the lift up port
relief in the main directional control valve to 27.6
± 0.4
MPa (4000
± 50 PSI). Remove cap and reconnect
plumbing.
6. Completely retract the boom or disconnect and cap
hoses from the main directional control valve retract
ports “A” to each telescope cylinder. In the cab, on the
left armrest, set the boom mode switches to “Manual”
and “IM”. With the engine running at full RPM, attempt to
telescope IN, adjust the telescope inner mid port “A”
relief in the main directional control valve to 24.1
± 0.4
MPa (3500
± 50 PSI). Set the boom mode switches to
“Manual” and “CM”, then adjust the telescope center/
outer mid port “A” relief in the main directional control
valve to 24.1
± 0.4 MPa (3500 ± 50 PSI). Remove caps
and reconnect plumbing.
7. Telescope mid section full out and disconnect and cap
the hoses from the main directional control valve inner
mid extend port “B” to each telescope cylinder. In the
cab, on the left armrest, set the boom mode switches to
“Manual” and “IM”. With the engine running at full RPM,
attempt to telescope OUT, adjust the telescope inner
mid port “B” relief in the main directional control valve to
20.7
± 0.4 MPa (3000 ± 50 PSI). With the hoses still
capped, continue on to step 8.
8. In the cab, on the right armrest, set the boom mode
switches to “Manual” and “CM”. With the engine running
at full RPM, attempt to telescope OUT or disconnect and
cap hoses, adjust the telescope center/outer mid two
stage port “B” relief (Figure 2-7) in the main directional
control valve to 17.2
± 0.4 MPa (2500 ± 50 PSI). If
adjustment is required, loosen the low pressure jam
nut, then turn the low pressure adjustment nut until
the relief setting is reached and tighten the jam nut.
With the hoses still capped, and the boom mode
switches set to “Manual and “CM”, continue on to step
9.
9. Telescope outer mid out and disconnect the Deutsch
connectors for the telescope center/outer mid 3-way
solenoid and the hose reel brake solenoid (see
(Figure 2-8). Actuate the telescope center/outer mid 3-
way solenoid by connecting it to the “Battery Hot” wire
harness for the hose reel brake solenoid. With the
engine running at full RPM, attempt to telescope OUT,
adjust the telescope center/outer two stage port “B”
relief (Figure 2-7) in the main directional control valve to
20.7
± 0.4 MPa (3000 ± 50 PSI). If adjustment is
required, loosen the high pressure jam nut, then turn the
high pressure adjustment nut until the relief setting is
reached and tighten the jam nut. Reconnect the Deutsch
connectors on both solenoids to their correct wire
harness. Remove caps and reconnect telescope
plumbing.
10. Remove pressure gauge from the load sense test port
and reinstall cap. Reconnect the hoist brake release
line.
Oil Cooler Relief 2700 (19.0) ± 50 (0.4) Oil Cooler Pump
Counterweight Removal Relief 3800 (26.2) ± 50 (0.4) Counterweight Removal Valve
Luffing Extension Lower Relief 1450 (10.0) ± 50 (0.4) Counterweight Removal Valve
Cab Tilt Relief 2500 (17.2) ± 50 (0.4) Counterweight Removal Valve
Counterweight Removal Pin Relief 2500 (17.2) ± 50 (0.4) Counterweight Removal Valve
Valve To Be Set
Pressure
Setting PSI
(MPa)
Tolerance
PSI (MPa)
Adjustment Location
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