Constant-speed throttle removal and installation

AR01.50-W-1000J

23.11.10

ENGINES 900.9 in MODELS 375.1, 970, 972, 975, 976

ENGINES 902.9 in MODEL 375.3, 950.5 /6, 952.5 /6, 953.6, 954.5

ENGINES 902.9 in MODEL 957 except CODE (MS8) Natural gas engine

ENGINES 902.9 in MODELS 375.1, 970, 972, 974, 975, 976

ENGINES 924.9 in MODELS 958.0, 970, 972, 974, 975, 976

ENGINES 925.9 in MODELS 970, 972, 974

ENGINES 926.9 in MODEL 958.0

ENGINES 926.9 in MODEL 950.5 /6, 952.5 /6, 953.6, 954.5, 957, 958.2

W01.50-0001-06

1 Cap

2 O-ring

3 Sealing ring

4 Piston

5 Conical piece

6 Upper spring plate

7 Spring

8 Bottom spring retainer

9 Valve

11 Spacer

W01.50-0010-06

4 Piston

5 Valve locks

6 Upper spring plate

7 Spring

12  Pliers

13  Spring disk compressor

15  Magnetic pin

 	Remove/install
1	Remove cylinder head	Models 375, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976	AR01.30-W-5800J
		Model 957	AR01.30-W-5800JB
2	Remove nozzle holder combinations		AR07.03-W-6831J
3	Remove cap (1) on cylinder head	 Installation: Replace O-ring (2).
4	Insert a suitable spacer (11) between valve disk and base	 Height of spacer (11) about 5.3 mm.
5	Use pliers (12) to remove piston (4)	 Installation: Replace piston (4) and seal ring (3) if necessary. Coat piston (4) and seal ring (3) with engine oil and install.
		 Pliers	*442589003700
6	Compress spring (7) with spring disk compressor (13) and take out collets (5) with magnetic pin (15).	 Installation: The valve locks (5) must engage.
		 Magnetic pin	*210589004000
		 Spring cup compressor	*442589056300
7	Relieve pressure on spring (7) and take out top spring retainer (6), spring (7) and bottom spring retainer (8)
8	Turn cylinder head and pull out valve (9)	 Mark valves relative to the installation location when removing a number of valves (9).
		 Installation: Coat valve stem (9) lightly with engine oil, push in valve (9) and lay spacer (11) (height about 5.3 mm) under valve disk. Observe marking to installation location.
9	Install in the reverse order

442 589 05 63 00

442 589 00 37 00

210 589 00 40 00

Spring disk compressor

Magnetic pin

Pliers