TURBOCHARGER GROUP--R.H.,TURBOCHARGER GROUP--L.H. 4N5584 - Caterpillar

Image1.2.1
Group Number 2
1. Check the existing hydraulic supply hose running from the bottom of the radiator shroud to the rotary coupling on the front of the reversing fan mounted between the engine and radiator. If it has steel spiral protector wrapped around it, unclip the electrical harness, remove the hose and replace it with a new 373-8490 Hose Assembly. Refer to Image2.1.1 for the bolt used to mount the clip to hold the hose.
Note: Drilling a new hole for the bolt is not necessary.
Image2.1.1
2. Refit the new 373-8490 Hose Assembly routing, per Image2.2.1, securing it with the 174-5907 Loop Clip, 6V-4248 Bolt, 7X-0584 Washers, and 2Y-5829 Nut.
3. Reclip the electrical harness to the hose using four 3S-2093 Cable Ties. Adjustment may be required to the electrical harness to gain extra length to allow it to follow the hose routing.
Image2.2.1
GROUP 2 machines require the rotary union and hub to be changed plus the hose rework as stated previously.
1. Before removing the fan, check that it has the old style rotary coupling design. The coupling is held in with a circlip. Refer to Image2.5.1. If the coupling is held in with four screws then the coupling does not require updating.
If the coupling is held in with a circlip then complete the following Rework Procedure. Ensure that when removing the fan from the machine it is kept vertical. It contains a small amount of oil that may drain out of the breather hole on the rear of the fan.
Safety:
The internal fan components are under pressure due to an internal spring. Please follow the instructions contained carefully in order to prevent injury to yourself, others, or the environment.
2. Take the existing fan and position it with the rotary union facing up. Try to drain as much oil as possible out of the weephole in the back of the fan.
Image2.5.1
3. Using a 1/4 inch - 12 point socket, remove all eight of the 1/4 inch cap screws from the cylinder.
Note: Remove the eight bolts slowly as the spring will push up the cover about 3/8
inch.
Refer to Image2.6.1.
Image2.6.1
4. Using two heel bars, gently pry the cover up and off the fan assembly. Refer to Image2.7.1.
Image2.7.1
5. Ensure that the O-ring is in good condition and seated properly. If the O-ring is damaged, it will need to be replaced.
6. Tip the fan over in order to remove any oil left inside the fan.
Refer to Image2.8.1.
Image2.8.1
7. Push the new cover down until it is about 3.8 inch above the sealing surface. Refer to Image2.9.1.
Image2.9.1
8. Re-install the eight 1/4 inch - 12 point cap screws into the cylinder. Tighten the screws to a specified torque of 9 ft.lbs (12 N.m). Refer to Image2.10.1.
Image2.10.1
9. Ensure that the position sensor pin is in the center of the bore. Refer to Image2.11.1.
Image2.11.1
10. Install the rotary union and fasten in place with the four screws. Using a torque wrench tighten the four T-15 Torx screws to a specified torque of 21 in/lb (2.37N). Refer to Image2.12.1.
Image2.12.1
11. Turn the fan over and fill