WHEEL & TIRE GP 2389915 - Caterpillar

Illustration 10 g00444610
Portable hydraulic tester (flow meter) (8) Portable hydraulic tester (flow meter) (20) Multitach (22) Valve
Turn valve (22) on portable hydraulic tester (8) clockwise. Record pump flow at each of the following pressures in Table 1. Use pressure gauge (12) at pressure tap (14) to monitor front pump delivery pressure or use pressure tap (11) to monitor rear pump delivery pressure.
Illustration 11 g00661530
P-Q characteristic curve
Table 1
Pump Flow Test    
   Measuring Points    
9800 kPa (1425 psi)
15700 kPa (2300 psi)    
17700 kPa (2550 psi)    
21600 kPa (3150 psi)    
29400 kPa (4250 psi)    
Flow measured liter/min (US gpm)     Front Pump                        
Rear Pump                    
Oil temperature °C (°F)                        
               
Engine speed (rpm)                        
               
Flow corrected liter/min (US gpm)     Front Pump                        
Rear Pump                    
Specification for flow rate liter/min (US gpm)     New    
122 6 (32 1.6)    
99 6 (26 1.6)    
92 6 (24 1.6)    
82 3 (22 0.8)    
53 4 (17 1.1)    
Service limit
116 (31)    
83 (22)    
78 (21)    
62 (16)    
48 (13)    Note: Specifications for flow rates are based on an engine speed of 2100 rpm. To attain more accurate test results, measured flow should be corrected with the following calculation.
Table 2
Corrected flow     =     Measured flow x 2100 rpm    
measured rpm  Note: Flow measurements must be done only during pressure rise.Note: The pump flow changes approximately 4.5 L/min (1.2 US gpm) for each 100 kPa (14 psi) of power shift pressure.