Starter — models with QR25DE engine (with manual transmission) (Nissan X-Trail T31)

Removal and installation

Removal

1. Disconnect the cable from the negative battery terminal.

2. Remove the air duct (intake). See chapter "Mechanical part of the engine".

3. Unscrew the nut of terminal "B" and disconnect the wiring of terminal "B".

4. Loosen the "S" terminal nut and disconnect the "S" terminal wiring.

5. Loosen the starter mounting bolts.

6. Remove the starter from the vehicle in an upward direction.

Installation

Installation is performed in the reverse order of removal.

Caution: Tighten the terminal "B" nut with care.

Disassembly and assembly

Assembly

When assembling the starter, apply high temperature grease to the pinion bearing and friction surfaces.

Please strictly follow these instructions:

Adjusting the starter pinion protrusion

Gap

• When the starter pinion is pulled back by closing the electromagnetic switch contacts, push it back by hand, eliminate the play, and measure the clearance "L" between the front edge of the pinion and the pinion stop.

Gap "L": See below p. "Technical data and specifications".

• If the gap is different from the norm, adjust it using an adjusting washer.

Examination

Checking the electromagnetic switch

• Before you begin testing, disconnect the cable from the negative battery terminal.
• Disconnect the starter terminal "M".

1. Checking the conductivity [between terminal "S" (A) and the switch body].

• If there is no conductivity, replace the electromagnetic switch.

2. Checking the conductivity [between terminals "S" (A) and "M" (C)].

• If there is no conductivity, replace the electromagnetic switch.

Checking the gear/clutch

1. Check the gear teeth.

• Replace the gear if the teeth are worn or damaged (Also check the condition of the ring gear teeth).

2. Check the gear teeth (if any).

• Replace the gearbox if the teeth are worn or damaged (Also check the condition of the gear teeth on the rotor shaft).

3. Make sure the starter pinion locks in one direction and rotates freely in the opposite direction.

• If it locks up or rotates in both directions or feels unusually resistant, replace it.

Checking the brushes

• Check if the brushes are worn out.

Minimum brush length: See below. "Technical data and specifications".

• If the measured value is less than the norm, replace the brushes.

Checking the brush springs

• Check the brush spring pressure by separating the spring from the brush.

Spring pressure (with a new brush): See below p. "Technical data and specifications".

• If the measured value is less than the norm, replace the brush springs.

Checking the brush holder

1. Perform an insulation test between the brush holder (+) and its base (-).

• If there is no conductivity, replace the brush holder.

2 Check if the brush moves freely.

• If the brush holder is bent, replace it; if the sliding surface is dirty, clean it.

Checking the starter

The magnet is attached to the stator with glue. Check if the magnet is attached to the stator and if there are any cracks. Replace the faulty components in the kit.

Caution: Do not clamp the stator in a vice or hit it with a hammer.

Checking the rotor

1. Conductivity test (between two adjacent segments).

• If there is no conductivity, replace the rotor assembly.

2. Insulation testing (between the commutator terminals and the shaft).

• If there is conductivity, replace the rotor assembly.

3. Check the surface of the switch.

• If the surface is rough, lightly sand it with #500-600 sandpaper.

4. Check the commutator diameter.



Minimum commutator diameter: See below. "Technical data and specifications".

• If the measured value is less than the norm, replace the rotor assembly.

5. Check the depth of the insulating mica from the surface of the commutator.

• If it is less than 0.2 mm, trim it to 0.5-0.8 mm.