Constant-speed throttle removal and installation

AR01.50-T-1000BB

25.6.01

ENGINE 457.941 in MODELNMB613.368

ENGINE 457.942 in MODEL NMB671.015 /020 /021 /030 /042 /332 /333

ENGINE 457.944 in MODEL NMB613.358 /367 /388

A01.50-0001-06

1 Cap

2 O-ring

3 Pistons

4 O-ring

5 Collet

6 Upper spring plate

7 Spring

8 Bottom spring retainer

9 Gasket

10 Valve

11 Spacer (only for removal)

A01.50-0002-06

3 Pistons

5 Collet

6 Upper spring plate

7 Spring

12  Pliers

13  Spring disk compressor

15  Magnetic pin

A01.50-0003-10

9 Gasket

10 Valve

14 Drift

 	Remove/Install
1	Remove nozzle holder combination	On model 613.358/388, model 671	AR07.03-T-6831BB
		On model 613.367/368	AR07.03-T-6831CB
2	Remove cylinder head	On model 613.358/388, model 671	AR01.30-T-5800BB
		On model 613.367	AR01.30-T-5800CB
		On model 613.368	AR01.30-T-5800CA
3	Remove end cover (1)	Installation: replace O-ring (2).
4	Use suitable spacer (11) to support valve (10)
5	Use pliers (12) to remove piston (3)	 Check piston (3) and O-ring (4) for wear and damage, if necessary replace piston (3) and O-ring (4).
		 Installation: Oil piston (3) and O-ring (4).Do not damage O-ring (4).
			*442589003700
6	Remove collets (5)	Press top spring plate (6) down with spring plate compressor (13) and take out collets (5) with magnetic pin (15).
			*210589004000
			*442589056300
7	Relieve spring plate compressor (13) and take out spring (7) with spring plate at top (6) and bottom (8)	 Installation: Do not mix up top spring plate (6) and bottom (8).
8	Turn cylinder head and pull out valve (10)	 Mark valve to matching cylinder head.
9	Remove gasket (9)	 Installation: Insert valve, push new gasket by hand over the groove in the valve stem and then press in with drift (14).
	Drift for pressing in engine brake sealing		WF58.50-A-0150-01A
10	Install in the reverse order

442 589 05 63 00

210 589 00 40 00

442 589 00 37 00

Spring disk compressor

Pliers

Magnet pin