Remove/install oil pump and pressure relief valve

AR26.55-W-3000B

30.7.09

TRANSMISSION 715.320

Remove/install oil pump and pressure relief valve

W26.55-1036-05

1 Spring (long)

2 Valve actuator

3 Valve element

4 O-ring

5 Spring (short)1)

6 Valve actuator1)

7 Valve element1)

8 O-rings

9 Roll pin1)

10 Oil pump cap (only for oil pump version 1)

11 Driven oil pump gear

12 Driving oil pump gear

13 Oil pump housing

14 Shim

15 Alignment pin

16 Gasket

17 End cover

18 Stop plug (only for vehicles without code (N55) Transmission oil cooling)

19 Pressure relief valve1)

20 Pressure relief valve (only for vehicles without code (N55) Transmission oil cooling)

Arrows Markings

1) Only on vehicles with code (N55) transmission oil cooling.

Modification notes

27.7.09	Picture and picture legend changed.
	Work procedure completely revised.

	Removing
1.1	Remove end cover (17)	Transmission without power takeoff	AR26.30-W-3001B
1.2	Remove PTO	Transmission with PTO
		PTO NA 121	AR26.45-W-0001M
		Power takeoff PTO 123, 124	AR26.45-W-0001B
		Power takeoff PTO 125-10b	AR26.45-W-0001I
		Power takeoff PTO 125-11b/2c, 125-11 c/2c	AR26.45-W-0001N
		Power takeoff PTO 125-11 b/1b, 125-11 b/1c	AR26.45-W-0001O
2	Remove oil pump end cover (10)	 Only with oil pump version 1. In vehicles with oil pump version 2, the oil pump outer cap (10) is not installed since it is already integrated in the end cover (17).
3	Remove driving oil pump gear (12) and driven oil pump gear (11)
4	Remove guide pin (15) and pull out oil pump housing (13) using puller		*715589033300
5	Remove shim (14)
6.1	Remove pressure relief valve (20)	Transmission without code (N55) Transmission oil cooling
		 Pressure relief valve (20) is spring loaded.
6.2	Remove pressure relief valve (19)	Transmission with code (N55) Transmission oil cooling
		 Pressure relief valve (19) is spring loaded.
	Install
7	Determine shim (14) for oil pump	Oil pump version 1	AR26.55-W-3000-01B
			*BE26.55-N-1001-01A
		Oil pump version 2	AR26.55-W-3000-01C
			*BE26.55-N-1001-01A
8	Insert shim (14)
9	Insert guide pin (15) into groove on transmission housing and insert oil pump housing (13)
10	Install driving oil pump gear (12) and driven oil pump gear (11)	 Marks (arrows) on driven oil pump gear (11) and driving oil pump gear (12) must face towards oil pump cap (10) or towards rear end cover (17). Lubricate driven oil pump gear (11) and driving oil pump gear (12)
11	Install oil pump end cover (10)	 Only with oil pump version 1.
12.1	Install pressure relief valve (20)	Transmission without code (N55) Transmission oil cooling
		 Replace O-rings (4, 8).
12.2	Install pressure relief valve (19)	Transmission with code (N55) Transmission oil cooling
		 Replace O-rings (4, 8). Note installation position of roll pin (9) and installation sequence of springs.
13.1	Install end cover (17)	Transmission without power takeoff	AR26.30-W-3001B
13.2	Install PTO	Transmission with PTO
		PTO NA 121	AR26.45-W-0001M
		Power takeoff PTO 123, 124	AR26.45-W-0001B
		Power takeoff PTO 125-10b	AR26.45-W-0001I
		Power takeoff PTO 125-11b/2c, 125-11 c/2c	AR26.45-W-0001N
		Power takeoff PTO 125-11 b/1b, 125-11 b/1c	AR26.45-W-0001O

Test and adjustment values for transmission oil cooling, oil pump

Number	Designation		Transmission 715.320/321


BE26.55-N-1001-01A	Play of oil pump	mm	0.0...0.08

Puller

715 589 03 33 00

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