ALLISON Transmission Solenoids 5000/6000 Series

Solenoid Location - ALLISON CLT-6061

Figure 1.1 - Allison 6000 Series (CLT-6061)

MAIN CONTROL VALVE

Figure 1.2 - Solenoids (B, C, D, E, and F) 

Figure 1.3 - Solenoids (C, D, E, and F)

LOCKUP CONTROL VALVE

Figure 1.4 - Lockup Solenoid (K) 

NOTE: The coils can also be measured for continuity, they should measure between approx. 60-69 Ohms (Solenoids B, C, D, E, F, and K).

Figure 1.5 - Solenoid B (63.58 Ohms/ OK)

Figure 1.6 - Solenoid E (55.3 M Ohms/ Fail)

SOLENOID AND CLUTCH CHART

Figure 1.7 - 5000/6000 Series Solenoids Energized per Gear

1^st Gear = Solenoids C, F (Clutches Engaged, Low-Range/ Splitter Low)
2^nd Gear = Solenoid C (Clutches Engaged, Low-Range/ Splitter High)
3^rd Gear = Solenoids D, F (Clutches Engaged, Intermediate-Range/ Splitter Low)
4^th Gear = Solenoid D (Clutches Engaged, Intermediate-Range/ Splitter High)
5^th Gear = Solenoids E, F (Clutches Engaged, Splitter Low)

a). Low-Range Shift Valve

→A spring pushes the low-range shift valve upward when Solenoid C is energized. Hydraulic pressure pushes the valve downward when Solenoid C is de-energized and the solenoid check ball seats.

→In its upward position, this spool valve directs hydraulic pressure to the low-range clutch. With the valve in its downward position, the low-range clutch is exhausted.

b). Intermediate-Range Shift Valve

→A spring pushes the intermediate-range shift valve upward when Solenoid D is energized. Hydraulic pressure pushes the valve downward when Solenoid D is de-energized and the solenoid check ball seats.

→In its upward position, this spool valve directs hydraulic pressure to the intermediate-range clutch. With the valve in its downward position, the intermediate-range clutch is exhausted.

c). High-Range Shift Valve

→A spring pushes the high-range shift valve upward when Solenoid E is energized. Hydraulic pressure pushes the valve downward when Solenoid E is de-energized and the solenoid check ball seats.

→In its upward position, this spool valve directs hydraulic pressure to the high-range clutch. In its downward position, the high-range clutch is exhausted.

d). Splitter Shift Valve

→A spring pushes the splitter shift valve upward when Solenoid F is energized. Hydraulic pressure

pushes the valve downward when Solenoid F is de-energized, and the solenoid check ball seats.

→When this spool valve is upward, hydraulic pressure is directed to the splitter-low clutch. When the valve is downward, hydraulic pressure is directed to the splitter-high clutch. When the splitter-high clutch is applied, the splitter-low clutch exhausts through the bore of the splitter-high trimmer. When the splitter-low clutch is applied, the splitter-high clutch exhausts through the bore of the splitter-low trimmer.

e). Pressure Regulator Valve

→Spring force pushes downward on the Solenoid Pressure Regulator Valve, allowing main pressure to flow into the area at the middle of the valve, to the upper ends of the shift valves, and through an orifice to the lower end of the valve.

→When main pressure at the lower end of this spool valve exceeds the force of the valve spring, main pressure is blocked, preventing solenoid pressure from increasing. When solenoid pressure falls, the valve moves downward, again admitting main pressure. When a balanced condition is reached (solenoid pressure equals spring force), a uniform hydraulic pressure, lower than main pressure, is established.

f). Priority Valve

→The Priority Valve gives main pressure priority to the solenoid-pressure regulator valve when the equipment engine is first started. This is necessary to ensure that the shift valves are all positioned downward (in neutral) so that no apply pressure is directed to a drive clutch until a range is selected.

→The valve is held downward by spring force until main pressure, reaching the step on the valve through an orifice, is sufficient to raise the valve against its two springs. When the valve is upward, main pressure enters the bore at a second point (below the orifice) and flows to the remainder of the circuit. By the time the valve is fully upward, main pressure (regulated to a lower pressure in the solenoid pressure regulator valve) has pushed all of the shift valves downward, except for the splitter shift valve, which opens when Solenoid F is energized.

→When the priority valve is fully upward, main pressure is exerted on its lower end as well as on its step area. The valve cannot move downward until main pressure falls below that required to raise it initially.

CONTROL VALVE BODY

Figure 1.8 - Clutches Engaged

#Hydraulic System Check Points

Figure 1.9 - Pressure Tap

→Main pressure can be checked by the gauge on the instrument panel (if so equipped) or by connecting a gauge to the tap on the front side of the Main-Pressure regulator body.

→Main pressure must be 170–185 psi (1172–1275 kPa) in all ranges with the Engine running at 1500 rpm.

Read More:

Solenoids Location on ALLISON Transmission 3000/4000 Series

Solenoids Location on ALLISON Transmission 9800 Series (S9820)

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