PUMP AS 4656884 - Caterpillar

Table 1
Required Tools    
Tool    Part Number    Description    Qty    
A     1U-6602     Photo-Tachometer     1    
Illustration 1 g02597639
Ventilation fan flow can be measured at ventilation flow gauge (1). If the indicated flow is less than 0.6 inches (w.c), the ventilation system and the pitot tube should be cleaned and inspected. If the indicated flow remains below specification, go to Step 2 to check ventilation fan speed.
Illustration 2 g02597656
Remove four bolts (3) (three bolts shown) from the base of fumes exhaust stack (2). Remove the fumes exhaust stack.
Illustration 3 g02597658
Open rear engine compartment cover (4) .
Illustration 4 g02597659
Remove four bolts (5). Remove pitot tube housing (6) and place to the side of the fumes exhaust duct. Do not disconnect the pitot tube pickup hose.
Illustration 5 g02597660
Remove six bolts (7). Remove fumes exhaust duct (8) .
Illustration 6 g02597698
Fumes Exhaust Duct Removed For Access To Ventilation Fan
Illustration 7 g02597700
Personal injury can result from rotating and moving parts.Moving fan blades and moving parts will throw or cut any object or tool that falls or is pushed into them.Make sure no one is working on, underneath or close to an engine that is running. Make sure the area is free of personnel.
Place piece of reflective tape (9) from Tool (A) on one of the blades of the fan.
Illustration 8 g02597703
Move engine start switch (10) to the START position. Release the engine start switch after the engine starts.
Operate the engine at low idle for a few minutes.
Illustration 9 g02597705
Move throttle control switch (11) to the HIGH IDLE position twice. For each switch activation, hold the switch in this position for less than 1 second. The engine speed should increase to 2200 rpm.
Illustration 10 g02597707
Monitor the hydraulic oil temperature on the operator display. Operate the machine until the oil temperature reaches 43 5.6 °C (110 10 °F).
Measure fan speed with Tool (A). The fan speed should be 2200 300 rpm.
Move throttle control switch (11) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
Move engine start switch (10) to the OFF position after the engine reaches low idle.
If the ventilation fan speed is outside the specified range, inspect and clean the orifice in the flow control valve. If ventilation fan speed remains outside the specified range, repair or replace the ventilation fan motor.
Replace fumes exhaust duct (8). Replace six bolts (7).
Replace pitot tube housing (6). Replace four bolts (5).
Replace fumes exhaust stack (2). Replace four bolts (3).
Close rear engine compartment cover (4) .