REFERENCE INFORMATION HIGH SPEED SHIFT CIRCUIT

HIGH SPEED SHIFT CIRCUIT DIAGNOSTIC FLOWCHART - TM-5-3895-373-20_294

HIGH SPEED SHIFT CIRCUIT DIAGNOSTIC FLOWCHART - TM-5-3895-373-20_296

TM-5-3895-373-20 Bituminous Distributor Body M918 Model D-63 Manual
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TM 5-3895-373-20 REFERENCE INFORMATION HIGH SPEED SHIFT CIRCUIT Refer to TM 5-3895-373-10 for engine starting and equipment operating procedures. Refer to paragraph 2.10 for connecting and disconnecting STE/ICE-R test set to DCA. The high speed shift valve reverses flow to the hydraulic propulsion motor control ports. The flow reversal changes the position of a port plate in the motor, producing more shaft revolutions per unit flow. If paving machine starts, circuit breaker CB1 is conducting +12 vdc to the neutral start circuit. Thereby, if high speed shift circuit fails, problem must be in switch, wiring, solenoid valve, or hydraulic propulsion motor. To avoid reversing polarity to the voltmeter, connect negative test lead to equipment ground and use positive lead to probe for voltage. Open center top right and center top left access doors per TM 5-3895-373-10 to gain access to high speed shift valve. Refer to paragraph 7.21 for harness and lead wire repair. 2-241

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