GLASS 4738921 - Caterpillar

Illustration 4 g00286276
9U-7400 Multitach Tool Group Tooling (C) is used to measure the fan speed. Refer to Operating Manual, NEHS0605, " 9U-7400 Multitach Tool Group " for the testing procedure.
Illustration 5 g00286369
9S-8140 Pressurizing Pump Tooling (D) is used to test the filler caps. This tool is also used to pressure test the cooling system for leaks.
Illustration 6 g00439083
1U-7297 Coolant/Battery Tester or 1U-7298 Coolant/Battery Tester Check the coolant frequently in cold weather for the correct glycol concentration. Use either Tooling (E) or Tooling (F) in order to ensure adequate freeze protection. The testers are identical except for the temperature scale. The testers give immediate, accurate readings. The testers can be used for antifreeze and coolants that contain ethylene or propylene glycol.Checking the Filler Cap
Table 2
Required Tools    
Tool    Part Number    Part Name    Qty    
D     9S-8140     Pressurizing Pump     1    One cause for a pressure loss in the cooling system can be a faulty seal on the radiator pressure cap.
Illustration 7 g00296067
Typical schematic of filler cap (1) Sealing surface between the pressure cap and the radiator
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap