INDICATOR (hyd. oil temp.) 2P8787 - Caterpillar

Air Starting System
Pressure Regulating Valve
Pressure Regulating Valve (Typical Illustration)
(1) Adjustment screw. (2) Regulator inlet. (3) Regulator outlet.To check and adjust the pressure regulating valve, use the procedure that follows:1. Drain the line to the pressure regulating valve or drain the air storage tank.2. Disconnect the regulator from the starter control valve.3. Connect an 8M2885 Pressure Indicator to regulator outlet (3).4. Put air pressure in the line or tank.5. Check the pressure.6. Adjust the pressure regulating valve as shown in Chart For Air Pressure Setting.7. Remove the air pressure from the line or tank.8. Remove the 8M2885 Pressure Indicator and connect the air pressure regulator to the line to the air starting motor.Each engine application will have to be inspected to get the most acceptable starting results. Some of the factors that affect regulating valve pressure setting are: attachment loads pulled by engine during starting, ambient temperature conditions, oil viscosity, capacity of air reservoir, and condition of engine (new or worn). The advantage of setting the valve at the higher pressures is increased torque for starting motor and fastener rotation of engine. The advantage of setting the valve at the lower pressures is longer time of engine rotation for a given reservoir capacity of supply air.Lubrication
Always use an air line lubricator with these air starting motors.For temperatures above 0°C (32°F), use a non detergent 10W engine oil.For temperatures below 0°C (32°F), use air tool oil.Air Starting Motor
Components Of The Air Starting Motor
(1) Motor housing cover. (2) Plug. (3) Plug. (3A) Plug. (6) Bolt (cap screw). (7) Lockwasher. (8) Gasket. (9) Rotor rear bearing. (10) Bearing retainer. (11) Rear end plate. (12) Cylinder. (13) Dowel. (14) Rotor vane. (15) Rotor. (16) Front end plate. (17) Rotor front bearing. (18) Motor housing. (19) Gear case gasket. (20) Rotor pinion. (21) Rotor pinion retainer. (22) Gear case. (23) Bearing rejecting washer. (24) Rear bearing (for the drive shaft). (25) Drive gear. (25A) Thrust washer. (26) Key (for the drive gear). (27) Front bearing (for the drive shaft). (28) Gear case cover. (29) Grease seal (for the drive shaft). (30) Cover seal. (31) Piston seal. (32) Bolt. (33) Lockwasher. (34) Drive shaft. (35) Drive shaft collar. (36) Piston. (36A) Piston ring. (37) Shift ring. (38) Shift ring retainer. (39) Shift ring spacer. (40) Piston return spring. (41) Return spring seat. (42) Starter drive (pinion). (43) Lockwasher. (44) Bushing (for the bolts). (45) Drive housing. (46) Drive housing bushing. (47) Oiler felt (for the bushing). (48) Oiler plug.
Rear View Of The Cylinder And Rotor For Clockwise Rotation
(12) Cylinder. (12A) Air inlet passages. (12B) Dowel hole. (15) Rotor.
Air Starting Motor
(6) Bolt. (12) Cylinder. (15) Rotor. (16) Front end plate. (22) Gear case. (25) Drive gear. (28) Gear case cover. (29) Grease seal. (32) Bolt. (34) Drive shaft. (35) Drive shaft collar. (42) Starter drive (pinion). (45) Drive housing. (49) Air inlet. (50) Deflector (air outlet). (51) Mounting flange (on the drive housing).The cylinder (12) must be assembled over the rotor (15) and on the front