HYDRAULIC SYSTEM NBT40 SERVICE MANUAL
2-10 Published 8-01-2017 Control # 287-11
Main Control Valve (without Aux. Hoist) - 3 Section Valve
Main Control Valve Item Numbers - 3 Section
Main Control Valve Port/Hosing - 3 Section
Item Description Item Description Item Description
1 Lift Cyl Relief Valve - extend 6 Lift Cyl Relief Valve - 11 Load Sense Bleed-Off
2 Main Hoist Relief Valve - raise 7 Main Relief Valve 12 Standby Pressure
3 Tele Cyl Relief Valve - extend 8 Load Sensing Relief Valve 13 Check Valve (4 places)
4 Tele Cyl Relief Valve - retract 9 Pilot Supply
5 Main Hoist Relief Valve - down 10 Gauge Port
Port Description Port Description Port Description
A Outlet - swivel port 4 G Tele Cyl - extend J2 Hose - Dump Valve B2
B Inlet - swivel port 3 H Tele Cyl - retract J3 Plugged
C Lift Cyl - extend B1 Hose - Dump Valve B4
D Lift Cyl - retract B2 Hose - Dump Valve B3
E Main Hoist - up B4 Hose - Dump Valve B1
F Main Hoist - down J1 Plugged
5
B1
B2
J1
2
FIGURE 2-3
4
A
B
C
D
F
E
H
G
J3
J2
B4
9
8
12
11
10
3
13
1
7
6
9
7590
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