Contents: Disassembling the secondary shaft ↳ Secondary shaft assembly ↳ Disassembly and assembly of the… ↳
Gears and shafts of gearboxes of type A and B
1 – primary shaft; 2 – secondary shaft; 3 – intermediate shaft constant mesh gear; 4 – intermediate shaft gear block axis; 5 – axle of intermediate gear of reverse gear; 6 – precision bearing; 7 – retaining ring; 8 – 3rd–4th gear synchronizer; 9 – 1st–2nd gear synchronizer; 10 – speedometer drive gear.
The black circles show the gear numbers of individual gears (AR – reverse gear).
Gear shift mechanism for type A and B gearboxes
1 – gear shift lever; 2 – control rod; 3 – selector; 4 – 1st–2nd gear forks; 5 – reverse gear forks; 6 – 3rd–4th gear forks; 7 – locking mechanism plate
Disassembling the secondary shaft
1. Remove the outer ring of the secondary shaft precision bearing from the rear of the gearbox. Knock out the secondary shaft completely from the rear of the crankcase using a copper hammer.
2. Remove the retaining ring from the 3rd–4th gear synchronizer hub and remove the synchronizer ring and 3rd gear gear.
3. Disconnect the 2nd gear gear and the secondary shaft thrust washer retaining ring.
4. Remove the 1st–2nd gear synchronizer hub retaining ring and remove the synchronizer hub.
5. Remove the 3rd-4th gear synchronizer. Disconnect the synchronizer hub and its springs.
Secondary shaft assembly
1. Insert the hub retaining ring and the 3rd-4th gear synchronizer. Install the crackers on the hub and position the cutouts on both cones opposite each other. Insert the retainer crackers and springs. The bent ends of the two spring rings should be positioned in one cracker.
2. Insert the synchronizer spring ring onto the hub, 1st–2nd gear synchronizer and lubricate the synchronizer.
3. Install the 1st gear gear, as well as the synchronizer sleeve and oil deflector on the secondary shaft.
4. Determine the thickness of the secondary shaft precision bearing snap ring.
5. Install the retaining ring in the groove of the rear part of the gearbox housing and move it until it stops against the outer race of the precision bearing. Measure the distance between the surface of the bearing stop and the upper surface of the groove of the mounting ring with a caliper. Subtract the width of the bearing from the result to determine the thickness of the additional ring required. Select the thickness of the ring from the available spare parts (see subsection 6.1.1).
6. Fill the secondary shaft bearing seat with grease.
7. Press in the bearing and secure with a retaining ring.
8. Install the speedometer drive gear. The distance between the front surface of the precision bearing and the speedometer drive gear (dimension A) should be 51.20 mm for type A gearbox and 49.25 mm for type B gearbox.
9. Install the 1st-2nd gear synchronizer. The alignment marks on the hub and synchronizer ring must be aligned. Make sure that the sliding clutch with the reverse gear gear is facing backwards.
10. Install the 2nd gear gear together with the retaining ring, the synchronizer ring and thrust washer, as well as the retaining ring, onto the secondary shaft.
11. Install the 3rd gear synchronizer ring on the secondary shaft using a press.
12. Install the 3rd-4th gear synchronizer hub on the secondary shaft using a press, with the longer flange of the hub facing forward, and install the retaining ring.
13. Heat the rear of the gearbox housing by immersing it in hot water and install the secondary shaft and snap ring.
Disassembly and assembly of the primary shaft and intermediate shaft gears
1. Remove the retaining ring and bearing from the input shaft using a press or puller.
2. Coat the seating surface of the input shaft precision bearing with general purpose grease, install the bearing on the press and insert the retaining ring.
3. Remove the sealing ring secured in the outer ring of the precision bearing of the primary shaft using a screwdriver. Fill the bearing with grease and insert the sealing ring using a suitable bushing, with the sealing edge towards the gearbox housing.
4. Remove the intermediate shaft axle, spacer sleeve and 19 bearing needles (type A gearbox), as well as the thrust washers on both sides of the intermediate shaft gear block. Type B gearboxes (reinforced design) have 21 bearing needles and do not have a spacer sleeve.
5. Insert the gear block onto the intermediate shaft axle and fill the space between the axle and the inner surface of the gear block hole with grease on both sides. Insert the thrust washer, 19 or 21 bearing needle, spacer sleeve (type A gearbox) and the next thrust washer.
The full article is on the online resource (www.FordBook.ru)