COVER 8X2787 - Caterpillar

Engine:
3114 (S/N: 1ZG1-UP; 5EF1-UP; 5JG1-UP)
3116 (S/N: 1NJ1-UP; 1SK1-UP; 2FR1-UP; 2MR1-UP; 2SG1-UP; 2WG1-UP; 4KG1-UP; 4PG1-UP; 5EN1-UP; 7TM1-UP)
3126 (S/N: 1ZJ1-UP; 4EZ1-UP; 6MK1-UP; 6MS1-UP; 6SR1-UP; 8NM1-UP; 9ZR1-UP)
3208 (S/N: 93Z1-UP)
3306 (S/N: 64Z1-UP)
3306B (S/N: 7JB1-UP)
3508B (S/N: 7SM1-UP)
The following solenoids are often wrongly replaced:
155-4651 Solenoid (Fuel Shutoff) (12 volt)
155-4652 Solenoid (Fuel Shutoff) (24 volt)
155-4653 Solenoid (Fuel Shutoff) (24 volt)The following sections explain solenoid operation and also provide troubleshooting guidance.Construction
Illustration 1 g00736320
155-4651 Solenoid (Fuel Shutoff) and 155-4652 Solenoid (Fuel Shutoff) (1) Start terminal - positive (No. 8-32 THD) (2) Stop terminal - positive (No. 8-32 THD) (3) GND terminal - negative (No. 10-32 THD) (4) Plunger release button (manual override) (5) Plunger - in the ON position (latched) (6) Plunger - in the OFF position (unlatched) (7) Plunger spring
Illustration 2 g00765119
155-4653 Solenoid (Fuel Shutoff) - flange mount (8) GND terminal - negative (No. 10-32 THD) (9) Start terminal - positive (No. 8-32 THD) (10) Stop terminal - positive (No. 8-32 THD) (11) Flange (12) Plunger - in the ON position (latched) (13) Plunger - in the OFF position (unlatched) (14) Plunger spring (15) Plunger release button (manual override)
Illustration 3 g00765161
Schematic symbol (16) Stop terminal (17) Stop coil (18) Ground terminal (19) Internal switch (20) Start coil (21) Start terminalThe major parts of a solenoid are listed below:Start Coil - The start coil (20) is energized when the key switch is in the START position.Stop Coil - The Stop Coil (17) is energized when the key switch is in the OFF position.Internal Switch - The internal switch (19) controls the