SkyTrak 3606 Service Manual User Manual
Page 381
Electrical System
10-63
Model 3606 • Origin 10/99
10.8.11 Transmission Solenoid Valves
The transmission is shifted via spool-type solenoid car-
tridge assemblies (Fig. 10– 69) or valves. While each 12-
volt solenoid coil at the transmission is the same, the wir-
ing to the solenoids is different and connected so that the
various transmission clutches can be actuated via input
from the transmission shift control switch (travel select
lever) and gear select switch.
Figure 10– 69. Transmission shift solenoids
are easily replaced.
So that the solenoids can be properly connected, the
transmission solenoid valve wiring is identified by color-
coded plastic bands as described in the chart below.
Solenoid
Color Code Indicator
2nd Clutch
GREEN
Reverse Clutch
BROWN
Forward Clutch
BLUE
Shuttle Clutch
LIGHT BROWN
1st Clutch
YELLOW
Note: Replacement solenoids will not have colored
bands.
If the transmission is not shifting properly and a faulty or
defective transmission shift solenoid is suspected,
remove and test the solenoid. Replace a defective or
faulty unit with a new one.
a. Transmission Solenoid Valve Removal
1. Disconnect the negative (-) battery cable at the
negative battery terminal (Fig. 10– 70).
Figure 10– 70. Disconnect the negative (-) battery cable
at the negative (-) battery terminal.
2. Remove the cover screws (3, Fig. 10– 69),
lockwashers (2) and protective cover (1) secured
over the transmission solenoid cartridge valves (7).
3. Remove the valve cartridge retainer nut (4) securing
the 12-volt solenoid coil (6) to the transmission.
4. Remove the 12-volt solenoid coil (6). An O-ring (5) is
on each side of the 12-volt solenoid coil. Remove
both O-rings. Always replace used O-rings with new
O-rings. Label the connections if removing more than
one solenoid valve.
5. Carefully withdraw the 4-way cartridge valve
assembly and count to make sure all four O-rings (8,
9, 10, and 11) come with it.
Note: Always replace used O-rings with new O-rings.
6. Inspect the cartridge valve for nicks, cut O-rings, and
debris or foreign material.
b. Transmission Solenoid Valve Disassembly
DO NOT further disassemble the transmission solenoid.
Replace a defective or faulty unit with a new one.
c. Transmission Solenoid Valve Inspection, Testing
and Replacement
Inspect the solenoid wiring and connector plug. Test for
continuity and shorting. The solenoid should have 7.5 to
10 ohms of resistance when testing with an ohm/volt
meter. Replace a defective or faulty solenoid valve.
1. Protective Cover
2. Lockwasher
3. Screw
4. Retainer Nut
5. Coil O-ring
6. Solenoid Coil
7. Cartridge Valve
8. O-ring
9. O-ring
10. O-ring
11. O-ring
MS1720
Reverse
Forward
Shuttle*
First
Second
(*not on Perkins naturally-aspirated 3-speed)
OS1040
Negative (-)
Terminal