Remove/install compressor

AR13.30-W-5510A

24.1.12

ENGINES 904.904 in MODEL 670

ENGINES 904.908 /914 /923 /936 in MODELS 668, 670

ENGINES 904.9 in MODEL 374, 375, 673, 674, 676, 958, 970, 972, 975, 976

ENGINES 906.9 in MODEL 374, 958, 970, 972, 974, 975, 976 except CODE (MZ9) Dual compressor

ENGINES 906.9 in MODEL 374, 375, 950, 952, 953, 954, 958 except CODE (MZ9) Dual compressor

W13.30-1053-06

Shown on ENGINE 906.9 in MODEL 970

1 Power steering pump

2 Cross plate

3 Compressor

4 Sealing rings

5 Coolant return flow line

6 Fitting

7 Compressed-air line

8 Suction pipe

9 Coolant feed line

10 Sealing rings

11 Drive gear

12 Nut

13 O-ring

W13.30-1054-10

11 Drive gear

12 Nut

15 Three-arm puller

16  Blocking device

Modification notes

2.4.07	Screw/bolt, compressor to crankcase		*BA13.30-N-1006-01A
2.4.07	Fitting, compressed air line to compressor		*BA13.30-N-1007-01A

 	Remove/install
 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
1.1	Tilt cab	Model 374, 375, 673, 674, 676, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976
		 Installation: Tilt the cab back after the leak test has been conducted
	Notes on tilting the cab		AH60.80-N-0003-01A
1.2	Remove service cover	Model 668, 670
2	Remove soundproofing from frame on the left and below	 Only for model 374, 375, 673, 674, 676, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976.
3	Remove MR/PLD control unit	 Only for engine 904.9.
		Models 374, 375, 673, 674, 676, 958, 970, 972, 975, 976	AR07.15-W-1628A
		Model 668, 670	AR07.15-D-1628D
 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
4	Drain and collect coolant	Model 374, 375, 673, 674, 676, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976	AR20.00-W-1142C
	Replace coolant	Model 668, 670	AP20.00-D-2080A
	Notes on coolant		AH20.00-N-2080-01A
5	Remove coolant return flow line (5) on compressor (3)	 Installation: Install new sealing rings (4).
			*BA13.30-N-1004-01A
6	Remove coolant feed line (9) on compressor (3)	 Installation: Install new sealing rings (10).
			*BA13.30-N-1004-01A
7	Remove compressed air line (7) on compressor (3)	 Counterhold fitting (6).
8	Check compressed-air line (7) for carbon deposits	 In the event of carbonization, also check compressed air lines between compressor (3), compressed air drier and the four-circuit protection valve, if necessary replace the carbonized parts.
9	Disconnect suction line (8) at compressor (3)
10	Detach power steering pump (1) from compressor (3) and remove cross plate (2)	 Put power steering pump (1) with attached steering lines to one side.
			*BA46.30-N-1001-01B
11	Remove crankshaft position sensor line at compressor (3) bracket and pull out crankshaft position sensor at timing case	 Only on models 673, 674, 676
		 Installation: Push in crankshaft position sensor and clamping pieces all the way.
12	Remove compressor (3)	 Collect engine oil which flows out.
		 Installation: Possibly turn drive wheel (11) to introduce it. Tighten bolts diagonally.
			*BA13.30-N-1006-01A
13	Remove O-ring (13) from compressor (3)	 Installation: Install new O-ring (13).
14	Clamp blocking device (16) in vise and attach compressor (3)	 Only if drive gear (11) must be removed.
			*904589036300
15	Remove nuts (12) and detach drive gear (11) with three-arm puller (15) from compressor (3)	 Only if drive gear (11) must be removed.
			*BA13.30-N-1005-01A
16	Remove fitting (6) on compressor (3) cylinder head	 Only if fitting (6) leaks.
		 Installation: Install new sealing rings.
			*BA13.30-N-1007-01A
17	Install in the reverse order
18	Check engine oil level using oil dipstick or on display, correct if necessary	 Observe engine oil grade set in maintenance system or Specifications for Operating Fluids.
 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
19	Start engine	 Do not rev up engine before oil pressure is indicated. The oil pressure gauge must indicate oil pressure after about 10 seconds.	*BE18.00-N-1001-01C
20	Switch off engine and check for leaks	 Visual inspection.

Check values for engine oil pressure

Number	Designation			Engines 900.9, 902.9, 904.9, 906.9


BE18.00-N-1001-01C	Engine oil pressure at	Idling speed	bar	0.5
		maximum speed	bar	2.5

 Compressor (compressed air system)

Number	Designation		Engines 900.9, 902.9, 904.9, 906.9


BA13.30-N-1004-01A	Banjo bolt, coolant line to compressor	Nm	40
BA13.30-N-1005-01A	Nut, drive gear to compressor	Nm	270
BA13.30-N-1006-01A	Screw/bolt, compressor to crankcase	Nm	50
BA13.30-N-1007-01A	Fitting, compressed air line to compressor	Nm	90

 Power steering pump

Number	Designation		Steering 765.60 with engine 904	Steering 765.8, 766.4 with engine 900.9, 902.9, 904.9, 906.9, 924.9, 925.9, 926.9


BA46.30-N-1001-01B	Screw/bolt, power steering pump to compressor	Nm	40	40

904 589 03 63 00

Blocking device

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