Remove/install compressor cylinder head

AR13.30-W-6010J

5.12.11

ENGINES 900.9 in MODEL 375, 970, 972, 975, 976

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

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

ENGINES 924.9 in MODEL 958, 970, 972, 974, 975, 976

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

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

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

W13.30-1122-06

1 Compressor

2 Cylinder head (compressor)

3 Fitting

4 Coolant line (return flow)

5 Compressed-air line

6 Air intake duct

7 Coolant line (feed)

8 Electrical connector

B16 Camshaft position sensor

W13.30-1123-06

1 Compressor

2 Cylinder head (compressor)

9 Seal/intake valve disk

10 Screw/bolts

11 Screw/bolt

Modification notes

20.10.11	Value changed: screw/bolt, cylinder head cover to valve intermediate plate		*BA13.30-N-1009-01A
8.11.11	Cylinder head for single-cylinder compressor altered, added.	Operation step 16	BT13.30-W-0002-01A

	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 pressure. 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
3	Partially drain coolant at radiator		AR20.00-W-1142J
4	Detach coolant lines (4, 7) at compressor (1)	 Collect coolant that flows out
5	Remove compressed air line (5) on compressor (1)	 Counterhold fitting (3).
6	Check compressed-air line (5) for carbonization	 In the event of carbonization, also check compressed air lines between compressor (1), compressed air drier and the four-circuit protection valve, if necessary replace the carbonized parts.
7	Remove air intake duct (6) on compressor (1)
8	Pull camshaft position sensor (B16) out of crankcase	 Do not disconnect electrical connector (8).
9	Remove cylinder head (2) at compressor (1)
10	Remove seal/intake valve disk (9)
	Checking
11	Check piston and cylinder barrel on the compressor (1) for damage and wear	 If wear or damage present: 
		Replace compressor (1).	AR13.30-W-5510J
12	Check removed cylinder head (2) for leaks	 If leaks can be recognized on the cylinder head (2): 
		Disassemble cylinder head (2), insert new seals and assemble	AR13.30-W-5511-04J
			*BA13.30-N-1007-01A
	Install
13	Lay on new seal/intake valve disk (9)	 Clean sealing surface.
14	Attach cylinder head (2) on compressor (1) and tight screw/bolts (10) crosswise	 Replace screw/bolts (10).
			*BA13.30-N-1002-01A
15	Tighten screw/bolt (11)	 Note: If the cylinder head (2) has been replaced the screw/bolt (11) must be loosened before tightening since this has not been tightened according to specification in the delivery condition and leaks can occur.
			*BA13.30-N-1009-01A
	Cylinder head on single-cylinder compressor altered		BT13.30-W-0002-01A
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 (6) on compressor (1)
18	Attach compressed-air line (5) at compressor (1)	 Counterhold fitting (3).
			*BA13.30-N-1010-01A
19	Attach coolant lines (4, 7) to compressor (1)		*BA13.30-N-1004-01A
20	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 during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
21	Start engine and check the connecting points and line interfaces on the compressor (1) for leaktightness for a running engine	 Visual inspection.
22	Turn off engine
23	Install noise encapsulation on 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 end position and secure with safety strut.	AS60.80-Z-0001-01A
24	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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