TRANSMISSION AND TORQUE CONVERTER CD5515-2/YB5515-2 SERVICE MANUAL
7-18 Published 1-20-2017, Control# 483-02
TESTING
Solenoid Identification
When testing individual clutch pressures page 7-19, it is
necessary to isolate the clutch being tested. For instance, to
check the layshaft clutch, you could select 1st gear forward.
This would energize the layshaft and forward low clutches.
Because we only want to check the layshaft clutch pressure
and not the forward low clutch pressure, remove the
electrical connector to the forward low clutch BEFORE
selecting 1st gear.
Use the tables below to determine which solenoid electrical
connectors should be removed when pressure-testing
individual clutches. Table 7-3 identifies the solenoid
connectors and Table 7-4 and Figure 7-14 identifies which
clutches are engaged when the various gears are selected.
NOTE: Travel directions as described are the actual travel
directions of the crane.
Test for Clutch Leakage
Isolating A Suspect Clutch
Stop the engine, connect a 0-20 bar (0-300 psi) pressure
gauge to the test connector A Figure 7-15 (mainline pressure
test point).
Make sure that both sides of all four wheels are chocked.
Apply the foot brake and the parking brake.
Start the engine and run at 1000 rpm. Engage 1st gear
forward. Record the pressure reading. Repeat the test for all
rear ratios in forward drive and record the pressure readings
as shown below.
Table 7-3: Solenoid Descriptions
Item Solenoid Description
SV1 Reverse Low
SV2 Reverse High
SV3 Layshaft
SV4 Mainshaft
SV5 Forward High
SV6 Forward Low
FIGURE 7-14
a0248
SV2 SV4
SV6
SV1 SV3
SV5
Table 7-4: Solenoid Valve Energizing Sequence
Gear Direction
Clutches Engaged
Solenoids
First Forward
Forward Low & Layshaft
SV6 and SV3
Second Forward
Forward High & Layshaft
SV5 and SV3
Third Forward
Forward Low & Mainshaft
SV6 and SV4 (SV4 only
used on six solenoid
transmissions)
Fourth Forward
Forward High & Mainshaft
SV5 and SV4 (SV4 only
used on six solenoid
transmissions)
First Reverse
Reverse Low & Layshaft
SV3 and SV1
Second Reverse
Reverse High & Layshaft
SV3 and SV2
Third Reverse
Reverse Low & Mainshaft
SV4 and SV1
Fourth Reverse
Reverse High & Mainshaft
SV4 and SV2
WARNING
DO NOT go under the crane with the engine running. Turn
off the engine, apply the parking brake, chock the wheels
and remove the ignition key before going underneath the
crane.
Reference Only
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