9. Install fuel pump (44), two screws (29), washers (18), locknuts (45), and four lockwashers (46) on
powerplant test stand frame.
10. Install fuel pump switch (47) in instrument panel. Connect 14 AWG lead (48) with shell (49) and washer
(50) to fuel pump (44) and switch (47).
11. Install fuel tank in space provided under powerplant test stand frame. See Figure 2-14. Install nipple
(51), elbow (52), adapter (53), shutoff valve (54), adapter (53), hose (55), elbow (56) from fuel tank supply
boss (72) and fuel pump inlet.
12. Install elbow (56), hose (55), elbow (57), nut coupling half (58), and tube body reducer (59) on fuel pump
13. Install quick disconnect coupling half (60) and nut (61) on fuel line bracket.
14. Connect adapter (59) to coupling half (60).
15. Install quick disconnect coupling half (62) and nut (61) on fuel line bracket.
16. Install elbow (63), hose (55), elbow (56), and nipple (64) from coupling half (62) and fuel tank return boss
17. Install any available radiator from 2-1/2 or 5-ton truck on powerplant test stand. Secure bottom radiator
mounts to powerplant test stand with nuts and washers supplied with radiator. Attach each side support
to top side of radiator (66), secure with same size screws and washers used in the vehicle (2-1/2 or 5-ton
truck) from which it came.
18. Connect radiator (66) to engine coolant outlet and inlet using radiator hoses, clamps, and fabricated
elbows for upper and lower radiator connections to the radiator, this will ease installation and removal.
To prevent any airlocks, mount the radiator so that the top of radiator is six inches above the top of the
engine being tested. If weather conditions are above 32 degrees, antifreeze will not be necessary. Fill the
radiator with plain clean water. Radiator (66) can be cooled by using a 12-volt fan commonly used on
most newer cars or trucks. It can be powered by one 12-volt battery with an on/off switch. Since there is
not enough load when testing the engine, the water temperature will not overheat unless left running for
an extended period at a high idle.
19. Install two gaskets (67) and radiator elbows (68) on radiator.
20. Install radiator hoses (69) and elbows (70) on two radiator elbows (68).
21. Connect circuit leads 6 and 6A of "starter to bus bar harness" to bus bar (40).
22. Install 100-amp connector panel, three screws (71), and locknuts (19) on floorplate number 1, see Figures
23. Connect M113A2/M548A1 starter, accessory, and 100-amp generator connectors to 100-amp connector
panel (see Figure 2-18). Secure with twelve screws (72) and locknuts (73). Mark each connector clearly
with a permanent ink or stencil to identify each connector.