Reductor P-350 (T-150), Kharkiv region.

Reductor PD-350 SMD-60 is installed on SMD-60 enginesTractor T-150

Transmission of rotation to the SMD-60 diesel engine from the starter motor is carried out by means of a gear unit and a single-stage gearbox 350.12.010.00 (Figure 1). The gearbox is equipped with a multi-disc clutch (pos. 8), an overrunning clutch (pos. 7, 17) and an automatic gear cut-off (pos. 12).

The gearbox housing (item 4) is attached to the flywheel housing with three bolts. On the gear shaft of the T-150 starter motor, which rotates in two ball bearings (pos. 1, 10), a gear (pos. 9) is freely mounted, having a bronze sleeve, to which the drum leading in the disc clutch (pos. 8) is riveted. The leadingdisks are connected to the drum through the grooves, the driven disks are connected to the sleeve (item 7) of the overrunning clutch.

The clutch is turned on by turning the lever (item 19). The sleeve (item 7) is made with grooves in which the rollers (item 17) roll. When the transfer of rotation from the starter motor occurs, the sleeve is jammed by the rollers on the shaft and the movement of the gear is reported (item 12). The engagement gear is connected to the gearbox shaft through splines, engaging with the diesel flywheel.
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The engagement of the gear with the flywheel crown is carried out by a lever located on the flywheel housing. Disengagement of the clutch occurs with the help of an automatic device consisting of a load holder (item 14), two loads (item 13), a pusher (item 15) and two springs (item 16).

To start the engine, the engagement gear (item 12), which moves freely on the splines of the shaft, is brought into engagement with the diesel flywheel by a lever. After that, start the starter motor and turn on the gearbox clutch (RPD T-150) with the lever (item 19). At the same time, the axial force is transmitted through the thrust bearing (item 3) to the pressure disc (item 6), which, in turn, compresses the driven and driving discs of the clutch. Further movement is transmitted to the sleeve (item 7), which is jammed onto the shaft through the rollers (item 17), starting to rotate with it. The gear (pos. 12) rotates the diesel crankshaft with its rotation. After starting, the number of revolutions of the crankshaft will quickly increase, and the transfer of rotation from it to the gearbox shaft will begin.

Fig. 1 — Starter motor reducer (RPD) T-150, SMD-60 (350.12.010.00)
Fig. 1 — Starter motor reducer (RPD) T-150, SMD-60 (350.12.010.00)

1 – front bearing; 2 – gearbox shaft; 3 – thrust bearing; 4 – gearbox housing; 5 – thrust bearing; 6 – pressure disc; 7 – bushing of the overrunning clutch; 8 – switch-on clutch; 9 – clutch clutch gear; 10 – rear shaft bearing; 11 – protective sleeve; 12 – inclusion gear (bendix); 13 – load of the shutdown mechanism; 14 – cargo carrier; 15 – pusher; 16 – return springs; 17 – overrunning clutch roller; 18 – movable stop; 19 – lever for switching on the gearbox clutch; 20 – clutch control roller; 21 – control plug of the lubricant level in the gearbox; 22 - clutch engagement roller.