INSULATION 3933384 - Caterpillar

3933384 INSULATION Caterpillar parts

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Alternative (cross code) number:
CA3933384
393-3384
3933384

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3933384 REAR COVER, FLYWHEEL HOUSING Suitable For Cummins 3933384

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18 Aug 2025

US: KMP BRAND

3933384 REAR COVER, FLYWHEEL HOUSING Suitable For Cummins 3933384
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After the oil seal seat 3933384 Cummins diesel engine parts General engine parts

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17 Jul 2025

US: FinditParts Inc

After the oil seal seat 3933384 Cummins diesel engine parts General engine parts
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Rear Cover OEM Replacement for Cummins 6CT 8.3C ISC QSC QSB 4B B3.9 K19 ISM11 3933384

$143.00

07 Jul 2025

CN: dongyushuang

Rear Cover OEM Replacement for Cummins 6CT 8.3C ISC QSC QSB 4B B3.9 K19 ISM11 3933384
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Number on catalog scheme: 6

Caterpillar 3933384 Parts scheme INSULATION

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Illustration 2 g02440016
Location of Pressure Taps and Pressure Reducing Valves (20) Main valve right side (21) Main valve left side (22) Upper knives (UK) pressure reducing valve (23) Feed roller arms (WA) pressure reducing valve (24) Tilt section (CF) pressure reducing valve (25) Lower knives (LK) pressure reducing valve (26) High pressure reducing valve (HPR) (27) Main relief valve (HP) (28) Saw bar feed cylinder pressure reducing valve (SPR) (A) Pressure tap for upper knives (M8) (B) Pressure tap for high pressure reducing valve (M4) (C) Pressure tap for feed roller arms (M7) (D) Pressure tap for tilt section (M6) (E) Pressure tap for lower knives section (M5) (F) Pressure tap for pump pressure (M1) (G) Pressure tap for saw bar feed cylinder (M9)Operational Pressures
Table 1
Functions and Pressure Settings for the Main Control Valve
Function Setting
Stand by pump pressure (1)
2500 kPa (360 psi)
25 bar
High pump pressure (1)
25000 kPa (3625 psi)
250 bar
Working Pressure
25000 kPa (3625 psi)
250 bar
Saw bar feed cylinder (SPR) (2)
5500 to 6500 kPa (800 to 940 psi)
55 to 65 bar
Feed roller arms (WA) (3)
8500 kPa (1235 psi)
85 bar
Lower knives (LK) (3)
3500 kPa (510 psi)
35 bar
Tilt (CF) (3) (4)
9000 to 12000 kPa (1300 to 1740 psi)
90 to 120 bar
Upper knives (UK) (3) (5)
3500 kPa (510 psi)
35 bar
High pressure reducing valve (HPR) (6)
13500 kPa (1960 psi)
135 bar
Rotator (Optional function) (7)
21000 kPa (3045psi)
210 bar
Main relief valve
30000 kPa (4350 psi)
300 bar
( 1 ) Check the carrier pressure
( 2 ) Depends on the tree type
( 3 ) Pressure with the wire harness disconnected from the solenoid valve.
( 4 ) May need to adjust so head does not bang the frame when tilted up
( 5 ) Pressure may need to be adjusted lower according to the application
( 6 ) Maximum pressure for all of the hydraulic cylinders except the saw.
( 7 ) The setting is nonadjustableProportional Pressures
Table 2
Upper Knives Minimum
3500 kPa (510 psi)
35 bar
Maximum
13500 kPa (1960 psi)
135 bar
Lower Knives Minimum
3500 kPa (510 psi)
35 bar
Maximum
13500 kPa (1960 psi)
135 bar
Feed Roller Arms Minimum
8500 kPa (1235psi)
85 bar
Maximum
13500 kPa (1960 psi)
135 bar Feed Roller Motors
Use the table below for troubleshooting the feed roller motors.
Table 3
Troubles Causes Remedies
Noisy Motor Without Load Regular rumbling Worn bearing support Replace the bear support
Vibrations Mounting and/or hydraulic piping becoming loose Tighten to torque
Under load Clattering Boost pressure too low Check the setting and counter pressure valve
Cavitation Excessive internal leaks Replace the cylinders block and distribution valve assembly
Motor Does Not Revolve No supply to the motor Check pump drive and pump inlet
The circuit does not reach working pressure Check condition of safety