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Technical description
Lubrication System
These engines have a forced lubrication system and piston cooling (see “Pistons” on page 39). The oil pump is
of the gear-wheel type and is located at the front of the oil sump. This pump is driven by the engine’s timing
gears.
The oil pump sucks oil up from the oil sump and then forces it out into two main channels in the cylinder block
(see basic diagram on next page). The oil passes through the lubricating oil filter and then on into the engine’s
oil channels for the forced lubrication of the engine, injection pump and turbocharger. The oil also passes
through via the piston cooling valve. From here a small amount of oil is channeled off, which then passes
through a by-pass filter (in the TAMD63 – accessory in the other engines) before being returned to the oil sump.
The rest of the oil continues through the oil cooler and out to the piston cooling jets.
Lubrication system TAMD71, -72
15. Filtered pressure oil to lubrica-
tion system
16. Pressure oil from oil pump
17. Return to oil sump via reduc-
tion valve
18. Pressure oil via piston cooling
valve to oil cooler and piston
cooling
19. Return oil to oil sump (via by-
pass filter, if fitted)
20. Filtered oil returning from lubri-
cating oil filter
21. Unfiltered oil to engine oil filter
1. Main oil gallery (lubricating oil)
2. Pressure line to turbocharger
3. Main oil gallery (piston-cooling oil)
4. Rocker assembly
5. Oil gallery to rocker assembly
6. Main bearings
7. Big-end bearings
8. Oil pump
9. Oil to oil cooler and piston cooling
10. Engine oil filter (full flow type)
11. Camshaft bearings
12. Overflow valve
13. Piston cooling valve
14. Relief valve
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