793C and 793C XQ Off-Highway Truck Hydraulic System Gear Pump (Hoist and Front Brake Cooling) Caterpillar


Gear Pump (Hoist and Front Brake Cooling)
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793C and 793C XQ Off-Highway Truck Hydraulic System [SENR1457]
HYDRAULIC SYSTEM
PUMP GP
793C and 793C XQ Off-Highway Truck Hydraulic System Gear Pump (Hoist and Front Brake Cooling)
793C and 793C XQ Off-Highway Truck Hydraulic System Gear Pump (Hoist and Front Brake Cooling)



Illustration 1g00847223

Rotation of the pump is clockwise when the pump is viewed from the drive end.

Type of pump: Gear

Bench test requirements: SAE 10W oil must be stabilized at 65°C (150°F) before the test is performed.

Drive End

Test at Full Speed:

Output ... 387.5 L/min (102.4 US gpm)
Test pressure ... 690 kPa (100 psi)
Test speed of engine ... 1750 rpm
Test speed of pump ... 1840 rpm
Output ... 385.4 L/min (101.8 US gpm)
Test pressure ... 6900 kPa (1000 psi)
Test speed of engine ... 1750 rpm
Test speed of pump ... 1840 rpm

Test at Half Speed:

Output ... 189.3 L/min (50.0 US gpm)
Test pressure ... 690 kPa (100 psi)
Test speed of engine ... 875 rpm
Test speed of pump ... 920 rpm
Output ... 185 L/min (48.8 US gpm)
Test pressure ... 6900 kPa (1000 psi)
Test speed of engine ... 875 rpm
Test speed of pump ... 920 rpm

Cover End

Test at Full Speed:

Output ... 387.5 L/min (102.4 US gpm)
Test pressure ... 690 kPa (100 psi)
Test speed of engine ... 1750 rpm
Test speed of pump ... 1840 rpm
Output ... 385.4 L/min (101.8 US gpm)
Test pressure ... 6900 kPa (1000 psi)
Test speed of engine ... 1750 rpm
Test speed of pump ... 1840 rpm

Test at Half Speed:

Output ... 189.3 L/min (50.0 US gpm)
Test pressure ... 690 kPa (100 psi)
Test speed of engine ... 875 rpm
Test speed of pump ... 920 rpm
Output ... 185 L/min (48.8 US gpm)
Test pressure ... 6900 kPa (1000 psi)
Test speed of engine ... 875 rpm
Test speed of pump ... 920 rpm

(1) As shown, assemble the shaft seals so that the spring loaded surfaces are opposite each other.

(2) Torque for the four studs on the pump drive housing ... 65 ± 10 N·m (48 ± 7 lb ft)

(3) Torque for eight nuts ... 228 ± 10 N·m (168 ± 7 lb ft)