Case Tractor FARMALL JX 90 DT

WARNING: Handle all parts carefully. Do not put your hands or fingers between parts. Wear suitable safety clothing, safety goggles, gloves and footwear.

Clean all parts carefully before carrying out the following operations.

Use tool 380000302 for valve removal and installation.

In case of minor sealing faults, the valves and their seats in the cylinder head may be re--faced using a pneumatic grinder or universal grinder.

In case of more serious defects, re -face the seats and grind the valves as shown in the relative chapter.

Enter the step below the valve contact band measurement

After grinding, check that the step below the valve contact band is no less than 0.5 mm (0.02 in.).

To easily and quickly trouble--shoot the starting system problems and reach conclusive results, it is recommended that you use a battery/starting tester (high discharge multimeter) with incorporated 0--20V voltmeter and 0--500 A ammeter.

When using testing devices, follow test procedures recommended by the manufacturer. If you do not have access to testing devices, carry out the following test using a normal 0--20V voltmeter and a 0--500 Amp ammeter in order to check correct starter motor functioning without removing it from the engine.

- check the battery is fully charged

- check that no wires in the starting system are broken or frayed and that there are no loose connections

- check the engine is not seized.

1. To test field winding insulation, connect an ohmmeter to each of the coil brushes in turn and to a clean and unpainted area of the casing. There should be no readings, that is, there should be no continuity.

2. To test coil continuity, connect an ohmmeter to each of the coil brushes in turn and to the main power clamp (biggest braided wire). Thereading should be 1 Ω.

3. If there is a failure in the field windings, then it will be necessary to change the whole box and field winding system.;

WARNING: Handle all parts with great care. Do not place hands or fingers between one part and another. Always wear the prescribed safety clothing, including protective glasses, gloves and shoes.

Place the PTO unit in the vice on the work bench

Use a punch to straighten the corrugations on the ring nut that retains the driven shaft components

Remove the ring nut from the driven shaft

Remove the four PTO unit internal support fixing screws

Remove the pin securing the fork rod

Withdraw the rod from the rear cover

Partially withdraw the PTO output shaft and remove the internal support together with the drive shaft, the driven gears, the sleeve and the engagement/disengagement/neutral control fork of the 540/750 PTO. Also, retain the thrust washer from the gear for reuse during reassembly

Remove the rear bearing thrust washer and remove the secondary shaft complete with PTO output shaft

Warning: Handle all parts with great care. Never place your hands or fingers between one part and another. Wear the prescribed safety clothing, including glasses, gloves and protective footwear.

Warning: Always use appropriate tools to align the holes. NEVER USE YOUR FINGERS OR HANDS.

Bevel pinion fitted and differential assembly inserted

Right and left hand supports secured on the gearbox transmission casing

Ring nuts brought into contact with the races of the bearings

Right and left hand ring nuts slightly screwed onto the support

Radial clearance on the sides of the bevel drive teeth

Setting high -- low backlash done correctly

Warning --The oil in the compressor of the recovery/recycling station should be replaced with new oil (code 293825) every 12 months to maintain the station’s refrigerant treatment capacity and to protect the compressor.

Open cock (13), and drain the oil into a container to be disposed of in accordance with local regulations for waste oil disposal.

Remove the caps from the service valves (14) on the side of the compressor and (13) on the sight glass.

Connect the service pipe of the evacuation station (294030) to valve (14) and connect a pick--up pipe from kit 294043to valve (13) on the sight glass.

Perform the evacuation operation with the pump in operation. The new oil can be aspirated from an external container by means of the pick--up pipe.

Once the compressor has been filled with correct quantity of oil (half--way up the sight glass) close valve (13), disconnect the pick--up pipe, and replace the cap on service valve (13). Continue the evacuation for approx. 30 minutes.

On conclusion, close the cocks, switch off the pump, disconnect the service pipe and replace the cap on service valve (14).

Record the operation on the appropriate service report card.