MAINTENANCE Changing Oil
OIL FILL 앫
Preserve the environment! Drained gear oil is classified as a hazardous toxic material which must be recovered, handled, stored and disposed of according to applicable State or Federal guidelines.
MACK-approved lubricants can be found on the internet at www.macktrucks.com, then click on the PARTS AND SERVICE category.
CHANGE INTERVAL 앫
Remove the oil filler plug (2) (Figure 59), then fill the transmission using specified oil until the oil is level with the bottom of the filler plug hole (also see Figure 56). Do NOT overfill.
Change the oil at intervals specified in the Maintenance and Lubrication Manual (TS494).
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Reinstall and tighten the oil filler plug as follows:
DRAINING OIL
1. Check that the O-ring on the plug is not cut or damaged.
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Before draining oil from the transmission, the oil should be at normal operating temperature.
2. Install the plug and tighten to 41–48 N•m (30–35 lb-ft) of torque.
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Remove the magnetic drain plug (Figure 58) from the bottom of the transmission main case and drain the hot oil into an industry-approved recovery container.
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Clean and replace the magnetic drain plug, then torque plug to 34–41 N•m (25–30 lb-ft).
DO NOT exceed 48 N•m (35 lb-ft) as plug can seize, resulting in damage to the transmission case when attempting to remove the plug. 59
58
Figure 59 — Oil Filler and Check Plug 1. Not for Oil Fill
2. Oil Filler and Check Plug
Figure 58 — Plug Locations 1. Magnetic Filter Plug 2. Oil Temperature Sensor
3. Oil Drain Plug 4. Oil Fill and Level Plug
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