place them on the Parking Stands.
NOTE 3: When the DC Control Power Circuit Breaker is in the (OFF) position (Pulled – Out), all control power is turned off to the PU. This will cause the HUB to stop functioning. This causes the network to not see the equipment shutdown and all PU’s after it. When pulling major maintenance the (A) (B) Communication Cable must be routed to the next PU in order to reestablish the communication network.
b. Drain the coolant system. Use Section 13.4.5.5 for procedures.
c. Remove the twenty mounting bolts securing the Front Side Panel. Use Figure 8.4.1-1 for reference.
d. Remove the Top Plenum Screen from above the Radiator and After Cooler Assembly about to be removed. Use Figure 8.4.2-1 for reference.
e. Loosen the eight Air Tube Clamps at the four Rubber Couplings.
f. Remove the U-bolts and mounting nuts securing the Air Tubes to the support bracket. g. Remove the Air Tubes.
h. Remove the Rubber Couplings and clamps.
i. Remove the four mounting bolts securing the Tube Support from Radiator and After Cooler Assembly.
j. Loosen the two clamps securing the Radiator Expansion Tank Hoses from Radiator and After Cooler Assembly and remove.
k. Loosen and Disconnect the lower radiator pipe clamp and slide off. l. Loosen and Disconnect the upper radiator pipe clamp and slide off.
m. Remove the A-frame interior access panels by loosening bolts and removing panels.
n. Tag and Disconnect the Hydraulic Cooler Hoses. Cap ends to prevent dirt from entering. Pull hoses through the inside panel of the A-frame.
o. Tag and Disconnect the Fuel Cooler Hoses. Cap ends to prevent dirt from entering. Pull hoses through the inside panel of the A-frame.
p. Tag and Disconnect the Hydraulic Fluid Hoses from the Radiator Cooling fan motor. Cap ends to prevent dirt from entering. Pull hoses through the inside panel of the A-frame.
q. Tag and Disconnect the Hydraulic Fluid Hoses from the ATAAC fan motor. Cap ends to prevent dirt from entering. Pull hoses through the inside panel of the A-frame.
r. Remove the Low Coolant Level Switch from Expansion Tank. s. Remove the Radiator Drain Hose.
t. Remove the Bottom Plenum Screen from under the Radiator and After Cooler Assembly. u. Remove the Radiator and After Cooler Assembly mounting hardware.
v. The Radiator and After Cooler Assembly weights approximately 850 pounds. Use a lift or crane to carefully lift the Radiator and After Cooler Assembly out of PU.
NOTE: The Radiator and After Cooler Assembly must be removed through the top of the PU. The lift or crane should have a minimum lift rating of 3 tons.
13.4.5.4 INSTALL RADIATOR AND AFTER COOLER ASSEMBLY To install the Radiator and After Cooler Assembly, proceed as follows:
a. This maintenance requires that the PU MUST be shutdown, isolated from any power plant electrical bus or utility connection, isolated from any power plant control system, and rendered unable to start. See procedures and warnings in paragraph 13.4.5.3.
b. Using a lift or crane, carefully place the Radiator and After Cooler Assembly in the PU.
NOTE: Radiators must be installed through the roof. The lift or crane should have a minimum of 3 ton rating.
c. Reinstall mounting fasteners from the underside.
d. Reinstall the Hydraulic Cooler hoses. Remove marking tags. e. Reinstall the Fuel Cooler hoses. Remove marking tags.
f. Reinstall the Radiator Fan Motor Hydraulic Hoses. Remove marking tags.
g. Reinstall the Aftercooler Assembly Fan Motor Hydraulic hoses. Remove marking tags. h. Reinstall the Radiator Drain Hose.
i. Reinstall the Bottom Plenum Screen.
j. Reinstall both the Upper and Lower Coolant Pipes and secure with clamps. k. Reinstall both Radiator Expansion Tank hoses and secure with hose clamps. l. Reinstall the Low Coolant Level Switch on the Expansion Tank.
n. Slide the Air Tube Rubber Couplings over the Air Tubing and reinstall with clamps. o. Reinstall the Air Tubes mounting U-bolts ensuring air tubes are properly aligned.
p. Fill coolant system until full. Refill the coolant system using Section 13.4.5.5 and Annex G as reference.
q. Close the Cooling System Air Bleed Valve on the engine after coolant starts to run out. Continue filling until the expansion tank has been filled to the proper level.
NOTE: After filling the cooling system, run the engine for several minutes with the Filler Cap off. Next, reinstall the Filler Cap and run the engine until the coolant becomes warm. Check coolant level in sight glass and fill as necessary.
r. Reinstall the Top Plenum Screen.
s. Reinstall the A-Frame Assembly interior side panels.
NOTE: After the engine has ran for several minutes, shutdown, and Remove A-Frame interior access panels to check for Hydraulic and Fuel Leaks at the Fan Motors, Hydraulic Cooler and Fuel Cooler. Repair as necessary and Reinstall Side Panels.
t. Reinstall the PU Front Side Panel.
13.4.5.5 SERVICE RADIATOR AND AFTER COOLER ASSEMBLY
ALWAYS WEAR EYE PROTECTION WHEN YOU PERFORM ANY SERVICE WORK ON A COOLING SYSTEM
RELEASE THE PRESSURE IN THE COOLING SYSTEM BEFORE PERFORMING ANY SERVICE WORK. IF THE PRESSURE IN THE COOLING SYSTEM IS NOT RELEASED OR THE TEMPERATURE OF THE SYSTEM IS NOT PERMITTED TO COOL, STEAM OR HOT WATER MAY BE RELEASED WHEN YOU REMOVE THE FILLER CAP. THIS MAY CAUSE PERSONAL INJURY.
TO RELEASE THE PRESSURE IN A COOLING SYSTEM, LET THE SYSTEM COOL, PUT A HEAVY CLOTH OVER THE CAP AND LOOSEN IT SLOWLY.
WARNING
WARNING
DO NOT ALLOW UNDILUTED CORROSION INHIBITORS OR DILUTED/UNDILUTED RADIATOR CLEANERS TO COME IN CONTACT WITH THE SKIN OR EYES.