﻿GET_GEVOMechL2_02_01_01_90 - STEP-BY-STEP Cont Screen
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4. If the check valve binds or if the thread-o-let has an oval shape, either replace the pipe or re-tap the thread-o-let with a 1.5-inch NPT tap as follows: 

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a. Remove the Victaulic coupling, as discussed in the Victaulic Coupling Removal section of this module, then remove the oil inlet pipe flange assembly from the left side of the oil cooler, as discussed in the Lubricating Oil Cooler Removal section of this module. 

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b. If re-tapping the thread-o-let, use the 1.5-inch NPT tap to re-tap the threads, then clean the pipe of metal shavings before reinstalling. 

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c. With Vic-Lube applied to the Victaulic coupling seals, as discussed in the Victaulic Coupling Installation section of this module, and with the Victaulic coupling mounted horizontally with respect to the split line of the coupling, reinstall the re-tapped or replacement oil inlet pipe flange assembly to the left side of the oil cooler, as discussed in the Lubricating Oil Cooler Installation section of this module. 

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<b>Caution:</b> Hold the check valve with a 2-inch crow’s foot so that it does not turn as the hose is tightened. 

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<b>Caution:</b> To avoid distorting the shape of the check valve, it is important that the check valve is not over-torqued and does not turn while installing the hose. 

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5. Install the replacement check valve, then torque to 115 ± 5 lb.-ft. (156 ± 7 Nm) with a TESCO T87330 2-inch open end crow’s foot. 

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6. With no Vic-Lube applied to the JIC hose fitting, use a TESCO T87340 2 ¼-inch crow’s foot to torque the hose to the check valve to 163 +4/-5 lb.-ft. (221 +5/-7 Nm).  

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7. Start the locomotive and re-evaluate oil pressure to ensure proper operation of the replacement check valve.
