PUMP 1382444 - Caterpillar

Before any air lines are disconnected from the apron air control valve, make sure the air pressure is zero.
1. Drain the air from the air tanks that are under the operator's station until the air pressure is zero. 2. Disconnect ground wire (1) from the panel assembly.3. Remove bolts (3) that hold the panel assembly. Remove panel assembly (2). 4. Disconnect air hoses (4) and (5) from the apron air control valve. The back-up warning terminal box is removed for better photo illustration of the linkage on the apron air control valve. 5. Remove cotter pin and pin (6). Remove the rod from the apron air control valve.6. Remove boot (8) and nut (7). Remove the apron air control valve from the bracket on the selector valve.Install Apron Air Control Valve
1. Put apron air control valve in position on the bracket that is connected to the selector valve. 2. Install nut (1) and boot (2).3. Connect rod (3) to the valve. 4. Connect two air hoses (4) and (5) to the apron air control valve. 5. Put panel assembly (7) in position and install bolts (8) that hold it.6. Connect ground wire (6) to the panel assembly.7. If adjustment to the apron air control valve is necessary, see Scraper Hydraulic System in Testing and Adjusting Form No. REG01583.end by:a) install hood (tractor and scraper engines) **This operation is in the Engine Disassembly and Assembly Section.Disassemble Apron Air Control Valve
start by:a) remove apron air control valve 1. Remove adapter assembly (2) from body assembly (1). 2. Remove union (3), strainer (4), spring (5), seat (6) and valve assembly (7) from body (8). 3. Remove valve (9) and O-ring seal (11) from stem (10). 4. Remove spring (14) and plunger (12) from adapter (13). Remove O-ring seal (15) from the plunger. Assemble Apron Air Control Valve
1. Install O-ring seal (3) on plunger (2).2. Install the plunger and spring (1) in adapter (4). 3. Install O-ring seal (6) on stem (5). Install valve (7) on stem (5). 4. Install valve assembly (12) in body (13) as shown. Install seat (11) and spring (10) on the valve assembly. Install strainer (9) in union (8). Install the union in the body. 5. Install body assembly (14) in adapter assembly (15).end by:a) install apron air control valve