Remove/install compressor cylinder head

AR13.30-W-6010JA

20.10.11

ENGINES 902.9 in MODELS 375.1, 970, 972, 974, 975, 976 with CODE (MZ9) Dual compressor

ENGINES 902.9 in MODEL 375, 950, 952, 953, 954 with CODE (MZ9) Dual compressor

ENGINES 925.9 in MODEL 970, 972, 974 with CODE (MZ9) Dual compressor

ENGINES 926.9 in MODEL 950, 952, 953, 954, 958 with CODE (MZ9) Dual compressor

ENGINES 926.9 in MODEL 958.0 with CODE (MZ9) Dual compressor

W13.30-1119-09

1 Dual compressor

2 Compressor cylinder head

3 Coolant line (return flow)

4 Compressed-air line

8 Electrical connector

B16 Camshaft position sensor

5 Air intake duct

6 Coolant line (feed)

7 Fitting

W13.30-1161-08

1 Dual compressor

2 Compressor cylinder head

11 Screw/bolts

9 Seal/suction valve disk

10 Screw/bolts

Modification notes

20.10.11

Value changed: screw/bolt,, cylinder head cover to valve intermediate plate

*BA13.30-N-1009-01A

	Removing
 Danger!	Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
	Notes on coolant		AH20.00-N-2080-01A
 Danger!	Risk of injury caused by body parts being pinched or crushed as cab is tilted	Ensure that no one is within tilting range of cab as it is being tilted. Always tilt cab all the way to end position and secure with safety strut.	AS60.80-Z-0001-01A
1	Tilt cab
	Notes on tilting the cab		AH60.80-N-0003-01A
2	Remove soundproofing on frame at upper left
3	Partially drain coolant at radiator		AR20.00-W-1142J
4	Remove coolant line (6) from dual compressor (1)	 Collect coolant that flows out
5	Detach coolant line (3) from dual compressor (1)	 Collect coolant that flows out
6	Remove compressed air line (4) at dual compressor (1)	 Counterhold fitting (7).
7	Check compressed-air line (4) for carbonization	 In the event of carbonization, also check compressed air lines between dual compressor (1), compressed air drier and the four-circuit protection valve, if necessary replace the carbonized parts.
8	Remove air intake duct (5) on dual compressor (1)
9	Pull camshaft position sensor (B16) out of cylinder crankcase	 Do not disconnect electrical connector (8).
10	Remove compressor cylinder head (2) on dual compressor (1)
11	Remove seal/suction valve disk (9)
	Checking
12	Check piston and cylinder barrels of dual compressor (1) for damage and wear	 If wear or damage present: 
		Replace dual compressor (1).	AR13.30-W-5510JA
13	Check removed compressor cylinder head (2) for leaks	 If leaks can be recognized on the compressor cylinder head (2): 
		Disassemble the compressor cylinder head (2), insert new seals and assemble	AR13.30-W-5511-04J
			*BA13.30-N-1007-01A
	Install
14	Lay on new seal/suction valve disk (9)	Clean sealing surfaces.
15	Attach compressor cylinder head (2) to dual compressor (1) using new screw/bolt,s (10)	 Observe tightening sequence.	AR13.30-W-6010-01JA
		 Note: If the compressor cylinder head (2) has been replaced the screw/bolt,s (11) must be loosened before tightening since these have not yet been tightened according to specification in the delivery condition and leaks can occur.
			*BA13.30-N-1002-01A
			*BA13.30-N-1009-01A
16	Push in camshaft position sensor (B16) all the way into the cylinder crankcase.	 Replace O-ring. Check bushing for camshaft position sensor (B16); replace if necessary.
17	Attach air intake duct (5) to dual compressor (1)
18	Attach compressed air line (4) to dual compressor (1)	 Counterhold fitting (7).
			*BA13.30-N-1010-01A
19	Attach coolant line (3) to dual compressor (1)		*BA13.30-N-1004-01A
20	Attach coolant line (6) to dual compressor (1)		*BA13.30-N-1004-01A
21	Pour in coolant		AR20.00-W-1142J
 Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns from working on the vehicle as it is being started or when the engine is running	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
22	Start engine and check the connecting points and line interfaces on the dual compressor (1) for leaks for a running engine	 Visual inspection.
23	Turn off engine
24	Install soundproofing on frame above on the left
 Danger!	Risk of injury caused by body parts being pinched or crushed as cab is tilted	Ensure that no one is within tilting range of cab as it is being tilted. Always tilt cab all the way to the position and secure with safety strut.	AS60.80-Z-0001-01A
25	Lower cab

 Compressor (compressed air system)

Number	Designation			Engines 900.9, 902.9, 904.9, 906.9	Engine 924.9, 925.9, 926.9


BA13.30-N-1002-01A	Screw/bolt, cylinder head to crankcase	Stage 1	Nm	25	25
		Stage 2	°	90	90
BA13.30-N-1004-01A	Banjo bolt, coolant line to compressor		Nm	40	40
BA13.30-N-1007-01A	Fitting, compressed air line to compressor		Nm	90	90
BA13.30-N-1009-01A	Screw/bolt, cylinder head cover to valve intermediate plate	Stage 1	Nm	7	7
		Stage 2 for single-cylinder compressor	°	120	120
		Stage 2 for twin-cylinder compressor	°	90	90
BA13.30-N-1010-01A	Union nut, air line to fitting	M221.5	Nm	65	65
		M261.5	Nm	75	75

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