Truck/Trailer Refrigeration Unit - Sunbelt Transport Refrigeration

. Electrical Pump (See Figure 4-4)To Check or Replace Filter1. Remove three screws from cover (item 1,Figure 4-4).2. Remove cover, gasket and filter.3. Wash filter in cleaning solvent and blow out with airpressure. Clean cover.4. To re-install reverse above steps.1. Cover2. Gasket433. Filter4. Fuel PumpFigure 4-4. Electric Fuel Pump4.4.7 Servicing Glow PlugsThe glow plugs, when energized, draw a nominal 7.0amps at 10.5 vdc. When servicing, the glow plug is to befitted carefully into the cylinder head to prevent damageto glow plug. Torque value for the glow plug is 0.8 to 1.5mkg(6to11ft-lb).Checking for a Defective Glow Pluga. One method is to place an ammeter (or clip-onammeter) in series with each glow plug and energize theplugs. Each plug (if good) should show amperage draw.b. A second method is to disconnect the wireconnection to the plug and test the resistance from theplug to a ground on the engine block. The reading shouldbe 0.7 to 1.2 ohms if the plug is good.214.5 SERVICING AND ADJUSTING V-BELTSWARNINGBeware of V-belts and belt drivencomponents as the unit may startautomatically.4.5.1 Belt Tension GaugeIt is recommended using one of the belt tensiongauges (tester) shown in Figure 4-5 whenever V-belts areadjusted or replaced.A belt tension gauge provides an accurate and easymethod of adjusting belts to their proper tension. Properlyadjusted belts give long lasting and efficient service. Toomuch tension shortens belt and bearing life, and too littletension causes slippage and excessive belt wear. It is alsoimportant to keep belts and sheaves free of any foreignmaterial which may cause the belts to slip.The belt tension gauge can be used to adjust all belts.The readings specified for Carrier Transicold units areapplicable only for our belts and applications, as thetension is dependent on the size of the belt and distancebetween sheaves. When using this gauge, it should beplaced as close as possible to the midpoint between twosheaves. (See Figure 4-6)The V-belts must be kept in good condition with theproper tension to provide adequate air movement acrossthe coils.When installing a new V-belt, the tension should besomewhat higher than specified and readjusted afterallowing the unit to run for some time.(Part No. 07-00203)(Part No. 07-00253)Figure 4-5 Belt Tension Gauge62-028844-6