AR13.30-W-6010CA | Remove/install compressor cylinder head | 21.6.10 |
ENGINES 457.9 in MODEL 374, 375, 940, 942, 943, 944, 958 with CODE (MZ8) Engageable dual compressor
W13.30-1163-09
1 Compressor cylinder head
2 Compressed-air line
3 Resonance reservoir
4 Bolt
8 Coolant line (return flow)
9 Coolant line (feed)
14 Bolts
5 Suction pipe
6 Control line
7 Sealing ring
W13.30-1129-12
1 Compressor cylinder head
10 Control valve
11 Pin
12 Seal/intake valve disk
13 Compressor crankcase
Arrow Cutout
Modification notes
11.5.10 | Work procedure completely revised. | ||
Note: If the compressor cylinder head was replaced, bolts (14) must be loosened before tightening since these are not tightened as specified in the delivery condition and leaks can occur; inserted. | Step 15 |
| 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. | |
| Notes on coolant | ||
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. | |
1 | Tilt cab | ||
| Notes on tilting the cab | ||
2 | Remove soundproofing on frame at upper left | ||
3 | Drain partially coolant at radiator | ||
4 | Disconnect suction line (5) on resonance container (3) | ||
5 | Remove bolt (4) and resonance container (3) | ||
6 | Disconnect compressed air line (2) at connecting point for frame | ||
7 | Remove clamp for compressed air line (2) on timing case bracket | ||
8 | Remove compressed-air lines (2) on compressor cylinder head (1) and inspect for carbonization | Counterhold fitting on compressor cylinder head (1). In the event of carbonization, also check compressed air lines between the compressor, compressed air drier and the four-circuit protection valve, if necessary replace the carbonized parts. | |
9 | Remove control line (6) on compressor (1) cylinder head | ||
10 | Detach coolant lines (8, 9) on compressor cylinder head (1) | Counterhold fitting and catch escaping coolant. | |
11 | Detach compressor cylinder head (1) | The control valves (10) can fall down while being lifted. | |
12 | Remove seal/intake valve disk (12) | ||
| Checking | ||
13 | Check piston and cylinder barrels of dual compressor for damage and wear | If wear or damage present: | |
Replace dual compressor. | |||
14 | Check removed compressor cylinder head (1) for leaks | If leaks are recognizable on the compressor cylinder head (1): | |
Disassemble compressor cylinder head (1), insert new seals and assemble | |||
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| Installation | ||
15 | Lay on new seal/intake valve disk (12) | Observe installation position of the seal/suction valve disk (12). The pins (11) on the compressor cylinder head (1) must match with the cutouts (arrows). Clean sealing surface. | |
16 | Attach compressor cylinder head (1) on compressor cylinder crankcase (13) with the new bolts | Observe tightening sequence. Ensure that the control valve (10) does not fall out. | |
If the compressor cylinder head was replaced, bolts (14) must be loosened before tightening since these are not tightened as specified in the delivery condition and leaks can occur. | |||
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17 | Attach coolant line (8, 9) to compressor cylinder head (1) | | |
18 | Attach control line (6) | Install new sealing rings. | |
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19 | Attach compressed air line (2) at connecting point for frame | Align compressed air line (2) to compressor cylinder head (1). | |
20 | Attach clamp for compressed air line (2) on timing case bracket | ||
21 | Tighten compressed air line (2) on compressor cylinder head (1) | | |
22 | Attach resonance tank (3) and tighten bolt (4) | ||
23 | Attach suction line (5) on resonance container (3) | Check sealing ring; replace suction line (5) if necessary. | |
24 | Pour in coolant | ||
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. | |
25 | Start the engine and check the separation and line interfaces on the dual compressor for a running engine for leaktightness | Visual inspection. | |
26 | Turn off engine | ||
27 | 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 end position and secure with safety strut. | |
28 | Lower cab |
Compressor (compressed air system)
Number | Designation | Engine | ||
BA13.30-N-1004-01L | Fitting, compressed air line to compressor | Nm | 80 | |
BA13.30-N-1005-01L | Fitting, suction line to compressor | Nm | 80 | |
BA13.30-N-1006-01L | Banjo bolt, control line to compressor | Nm | 15 | |
BA13.30-N-1007-01L | Bolt, cylinder head to compressor crankcase | Stage 1 | Nm | 25 |
Stage 2 | ° | 90 | ||
BA13.30-N-1008-01L | Fitting, coolant line to compressor | Nm | 30 | |
BA13.30-N-1009-01L | Bolt, cylinder head cover to valve intermediate plate | Stage 1 | Nm | 7 |
Stage 2 | ° | 90 | ||
BA13.30-N-1010-01L | Union nut, coolant line to compressor fitting | Nm | 40 | |
BA13.30-N-1011-01L | Union nut, air line to fitting | M221.5 | Nm | 65 |
M261.5 | Nm | 75 | ||