Engine | 900.9 in model 375.1, 970, 972, 975, 976 |
Engine | 902.9 in model 375.15, 970, 972, 974, 975, 976 |
Engine | 902.9 in model 375.3, 950.5/6, 952.5/6, 953.6, 954.5 |
Engine | 902.9 in model 957.5/6 |
Engine | 904.9 in model 375.1, 970, 972, 975, 976 |
Engine | 904.9 in model 673, 674, 676 |
Engine | 906.9 in model 374.5, 375.3, 950.5/6, 952.5/6, 953.6, 954.5 |
Engine | 906.9 in model 957.5/6 |
Engine | 906.9 in model 970, 972, 974, 975, 976 |
Engine | 924.9 in model 970, 972, 974, 975, 976 |
Engine | 925.9 in model 970, 972, 974 |
Engine | 926.9 in model 950.5/6, 952.5/6, 953.6, 954.5 |
Engine | 926.9 in model 957.38/5/6 |
N05.30-2070-01
N05.30-0307-01
N03.30-0313-01
Inlet valve |
1 | Adjustment screw |
2 | Jam nut |
Outlet valve |
1 | Adjustment screw |
2 | Jam nut |
3 | Cap |
4 | Turning device |
Shown on engine 904.9 |
S10 | External engine start |
S11 | External engine stop |
N01.00-2048-01
1 | Remove cylinder head cover | ||
| Engine 900.9, 924.9, 925.9, 926.9; engine 902.9 except code MS8 (Natural gas engine) | ||
| Engine 904.9; engine 906.9 except code MS8 (Natural gas engine) | ||
| ENGINE 902.9, 906.9 with CODE MS8 (natural gas engine) | ||
2 | Select method for adjusting valve clearance | ||
| General information on adjusting valve clearance | ||
| General information on adjusting valve clearance | ||
Method 1: Adjustment as per injection sequence. | |||
3.1 | Detach cap (3) and install rotation device (4) on inspection hole in timing case and move engine to the crankshaft position of the selected adjustment method | Crank engine using cranking device (4). | |
Bolt, turning device to timing case | |||
Turning device | |||
Danger ! | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts. | |
3.2 | Press and hold external engine stop button (S11), then also press the external engine start button (S10) and move the engine into the crankshaft position of the selected adjustment method | Crank the engine with the starter. | |
The engine will not start if the external engine stop (S11) and the external engine start (S10) are pressed at the same time. | |||
4 | Adjust valve bridges | ||
| |||
Only for engine 904.9 up to engine end no. 039739 or engine 906.9 up to engine end no. 041955 and only required after work on cylinder head or rocker arm assembly. | |||
Jam nut on valve bridge adjustment screw | |||
5 | Inspect valve clearance (arrow) and adjust | ||
Check or adjust valve clearance (arrow) when the engine is cold, at the earliest 30 minutes after switching off the engine, also when operated for a short time in order to guarantee an even warm-up. | |||
Valve clearance | |||
Test tolerance for valve clearance | |||
Jam nut on rocker arm adjustment screw | |||
Torque tool set | |||
6 | Remove cranking device (4) and install end cover (3) for inspection hole in timing case | If the engine was cranked using the turning device (4). | |
Inspection hole cap to timing case | |||
Turning device | |||
7 | Install cylinder head cover | ||
| Engine 900.9, 924.9, 925.9, 926.9; engine 902.9 except code MS8 (Natural gas engine) | ||
| Engine 904.9; engine 906.9 except code MS8 (Natural gas engine) | ||
| ENGINE 902.9, 906.9 with CODE MS8 (natural gas engine) |
Check values for valves |
Number | Designation | ENGINE 904.9## ## up to 039739, ENGINE 906.9## ## up to 041955 except CODE MS8 | ENGINE 904.9## ## as of 039740, ENGINE 906.9## ## as of 041956 except CODE MS8 | ||
BE05.30-N-1013-01B | Test tolerance for valve clearance | Inlet | mm | –0,05/+0,05 | –0,05/+0,05 |
Outlet | mm | –0,10/+0,10 | –0,10/+0,10 |
904 589 04 63 00
Turning device
003 589 05 09 00
Torque tool set