47
Technical description
Lubrication system
These engines have a forced lubrication system and piston cooling (see “Pistons” on page 43). 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 channelled off, which then passes
through a by-pass filter (in the TAMD63, TAMD73 and TAMD74 – accessory in the TAMD71) 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 TAMD71
1. Main oil channel (lubricating oil)
15. Filtered oil (pressure) to lubri-
2. Pressure line to turbocharger
cation system
3. Main oil channel (piston-cooling oil) 16. Oil (pressure) from oil pump
4. Rocker mechanism
17. Return oil to oil sump via relief
5. Oil channel to rocker mechanism
valve
6. Main bearings.
18. Oil (pressure) via piston cool-
7. Big-end bearings
ing valve to oil cooler and piston
8. Oil pump
cooling
9. Oil to oil cooler and piston cooling
19. Return oil to oil sump (via by-
10. Lubricating oil filter (full flow type)
pass filter, if fitted)
11. Camshaft bearings
20. Filtered oil returning from lubri-
12. Overflow valve
cating oil filter
13. Piston cooling valve
21. Unfiltered oil to lubricating oil
14. Relief valve
filter
7740156 - Downloaded from www.volvopenta.com 22/07/2009 00:44:08
Summary of Contents for TAMD63L
Page 1: ...INSTRUCTION BOOK TAMD63L P TAMD71B TAMD73P WJ TAMD74C L P ...
Page 2: ...7740156 Downloaded from www volvopenta com 22 07 2009 00 44 08 ...
Page 120: ...118 Notes 7740156 Downloaded from www volvopenta com 22 07 2009 00 44 08 ...
Page 121: ...119 Notes 7740156 Downloaded from www volvopenta com 22 07 2009 00 44 08 ...
Page 123: ...7740156 Downloaded from www volvopenta com 22 07 2009 00 44 08 ...
Page 124: ...7740156 0 English 6 2000 AB Volvo Penta SE 405 08 Göteborg Sweden www volvopenta com ...