Preparing Tractor Hydraulics (5105, 5205 Tractors)

Prepare Tractor

1. Park tractor on level surface and engage park brake. Place wheel chocks or wood blocks in front of and behind left rear wheel.

2. With engine running, fully raise rockshaft.

3. Stop engine. Operate SCV lever(s), if equipped, to release hydraulic pressure in the system.

4. Raise right side rear wheel with floor jack and remove wheel. Support right side rear axle with jackstand and remove floor jack.

5. Remove right side rear fender.

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Install Inlet Housing, End Cap and Adapter Fittings (Early Tractors or Tractors Without SCV(s) and Without Mid-Mount Control Valve)

1. Disconnect inlet housing supply line (A).

2. Remove and retain adapter fitting (B) from inlet housing.

3. Remove and retain socket head screws (C).

4. Remove and discard inlet housing (D).

5. Clean mating surfaces of new inlet housing and right side of rockshaft. Inspect O-rings (E) for wear or damage. Replace if necessary.


A-Inlet Housing Supply Line
B-Adapter Fitting
C-Socket Head Screws (3 used)
D-Inlet Housing
E-O-Rings (3 used)

LV6023
LV6024

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6. Apply medium strength thread lock to socket head screws (C) before installing.

7. Install inlet housing (D) and socket head screws. Tighten screws to specification.

Inlet Housing - Specification

Socket Head Screw -Torque 32 N·m (24 lb-ft)

8. Inspect O-rings on adapter fitting (B). Replace if necessary. Install adapter fitting and tighten to specification.

Inlet Housing - Specification

Adapter Fitting -Torque 69 N·m (51 lb-ft)

NOTE: Use a wrench to hold adapter fitting in place while using another wrench to tighten inlet housing supply line.

9. Connect inlet housing supply line (A). Hold adapter fitting in place using a wrench and tighten supply line to specification.

Inlet Housing - Specification

Supply Line -Torque 102 N·m (75 lb-ft)

LV6025

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10. Remove and retain plugs from pressure port (A) and pressure return port (B) on end cap (C).

NOTE: Installing pipe plug into pressure return port provides hydraulic power to backhoe control valve when backhoe is connected.

11. Remove internal plug (D) from inside the pressure port and install it in the pressure return port.


A-Pressure Port (marked R)
B-Pressure Return Port (marked S)
C-End Cap
D-Internal Plug

LV6026
LV6031

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12. Install adapters (A) in end cap (B). Tighten to specification.

Inlet Housing - Specification

End Cap Adapter Fitting -Torque 50 N·m (37 lb-ft)

13. Apply medium strength thread lock to cap screws (C).

14. Install end cap to inlet housing using two M10 x 40 cap screws. Tighten cap screws to specification.

Inlet Housing - Specification

End Cap Cap Screw -Torque 40 N·m (29 lb-ft)

15. Connect hydraulic hoses and install sump return quick-disconnect coupler. See procedure below.


A-Adapter Fitting (2 used)
B-End Cap
C-Cap Screw (2 used)

LV6027
LV6030

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Install Adapter Fittings (Later Model Tractors With or Without SCV(s))

1. Remove and retain plugs from pressure port (A) and pressure return port (B) on end cap (C).

NOTE: End cap shown removed for clarity of photo.

NOTE: Installing pipe plug into pressure return port provides hydraulic power to backhoe control valve when backhoe is connected.

2. Remove internal plug (D) from inside the pressure port and install it in the pressure return port.


A-Pressure Port (marked R)
B-Pressure Return Port (marked S)
C-End Cap
D-Internal Plug

LV6028
LV6031

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3. Install adapters (A) in end cap (B). Tighten to specification.

Inlet Housing - Specification

End Cap Adapter Fitting -Torque 50 N·m (37 lb-ft)

4. Connect hydraulic hoses and install sump return quick-disconnect coupler. See procedure below.

Connect Hydraulic Hoses

IMPORTANT: To prevent tractor hydraulic system damage, pressure hose from Step 1 and pressure return hose from Step 2 MUST be connected together.

1. Assemble 180 cm (71 in.) hydraulic pressure line with female quick-disconnect coupler, 90° fitting, hose cover, tie straps, and caution tag. Ensure caution tag is attached to female quick-disconnect coupler.

2. Assemble 74 cm (29 in.) hydraulic pressure return hose with male quick-disconnect coupler, hose cover and tie straps.

LV6029


A-Adapter Fitting (2 used)
B-End Cap

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Hydraulic Connections (Tractors With Mid-Mount Control Valve)

1. Disconnect mid-mount coupler pressure return hose from port S on end cap (A) and mid-mount control valve pressure return port.

2. Connect 74 cm (29 in.) backhoe pressure return hose assembly (C) with male quick-disconnect coupler to pressure return port (marked S) on inlet housing end cap.

3. Connect 180 cm (71 in.) backhoe pressure hose assembly (B), with 90° female quick-disconnect coupler to pressure return port of mid-mount control valve.

4. Install sump return coupler. See procedure below.


A-Inlet Housing End Cap
B-Backhoe Pressure Hose
C-Backhoe Pressure Return Hose
D-Mid-Mount Control Valve Pressure Hose
E-Mid-Mount Control Valve Sump Return Hose
F-Mid-Mount Control Valve

LV6043

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Install Sump Return Coupler

1. Remove sump return plug (A) from top of rockshaft housing (B).

2. Drill and tap top of sump return plug for 1/2 in. NPT pipe threads.

3. Install 3 in. pipe nipple (C) on sump return plug.

4. Assemble 90° fitting (D), dust cap (F), and preassembled male quick-disconnect coupler.

5. Install quick disconnect fitting assembly on 3 in. pipe nipple.


A-Sump Return Plug
B-Rockshaft Housing
C-3 in. Pipe Nipple
D-90° Fitting
E-Quick-Disconnect Male Coupler

LV6042
LV6044

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