Assembly components of the gearbox Chevrolet Niva
Chevrolet Niva gearbox - mechanical with manual switching, has five front-run gears and one - rear, all transmissions of the front running are synchronized.
Cabinet parts of the box - Carter of clutch, actually Carter gearbox and rear lid - cast from aluminum alloy and picked up with hairpins with nuts.
The connections are sealed with cardboard gaskets (a sealant can be used during repair). To improve the heat sink, the surface of the Chevrolet Chevrolet gearbox crank can have edges.
Fig.21. Chevrolet Niva gearbox components
1 - primary shaft; 2 - primary shaft seal; 3 - Carter clutch; 4 - Spring washer; 5 - Sapun; 6 - needle bearing of the secondary shaft; 7 - gear gear synchronizer IV transmission; 8 - switching plug III and IV gears; 9 - Sliding clutch synchronizer III and IV gears; 10 - Coupling hub synchronizer III and IV gears; 11 - gear and gear of the transmission synchronizer III; 12 - gear and gear of the transmission synchronizer II; 13 - switching plug I and II gear; 14 - Coupling of the synchronizer I and II gear gear of Shevi Niva; 15 - gear and gear gear transmission coggle; 16 - intermediate bearing of the secondary shaft; 17 - driven reverse gear gear; 18 - Spring washer; 19 - stop ring; 20 - transmission synchronizer coupling; 21 - thrust drive control gearbox; 22 - the gear shift lever housing; 23 - gear shift lever; 24 - driven gear gear V; 25 - oil removal washer; 26 - spacer sleeve; 27 - flange of elastic coupling; 28 - secondary shaft; 29 - the seal of the secondary shaft; 30 - rear bearing of the secondary shaft; 31 - Block bearing gears; 32 - gear block V transmission and reverse; 33 - Bolt fastening the gear gear gear gear Chevrolet Niva; 34 - Stubborn washer; 35 - Coupling hub synchronizer V transmission; 36 - intermediate reverse gear; 37 - rear cover; 38 - rear bearing intermediate shaft; 39 - lower cover; 40 - plug of the fuel hole; 41 -promething shaft; 42 - front bearing intermediate shaft; 43 - Carter
gearboxes; 44 - Rear Bearing of the Primary Shaft; 45 - Coupling Turning Bearing Guide
Bottom Carter is closed with a steel stamped lid with a gasket (fastening - on studs). The clutch crankcase is mounted bolted to the engine cylinder block.
To ensure the coolest of the crankshaft of the engine and the primary shaft of the gearbox of Chevrolet Niva Carter is centered on two sleeves (there are grooves in the fastening holes of the block and crankcase).
On the back lid of the gearbox set the third support of the power unit. It is attached to the crossbar, and the latter - to the floor of the body (on the welded bolts).
Fig.22. The appearance of the Chevrolet Niva gearbox assembled with the clutch shutdown drive mechanism
1 - Carter clutch; 2 - Carter gearbox; 3 - Sapun; 4 - gear lever housing; 5 - flange; 6 - Case thrust; 7 - drive thrust; 8 - Thrust clamp; 9 - reverse light switch; 10 - bracket fastening of the receiving pipe; 11 - centering sleeve; 12 - a centering sleeve seal; 13 - flange of elastic coupling; 14 - rear cover; 15 - bottom cover; 16 - cork plug; 17 - cover fork shipping clutch; 18 - clutch shutting
In the Chevrolet Chevrolet Shift Box Carter on the left side, the filler (control) hole is located, and in the bottom cover of the crankcase - drain.
Holes are closed with cork with conical carvings. In the drain traffic jam is a magnet. It delays the steel particles entering the oil when wear out parts.
In the upper part of the clutch crankcase will be screwed. It prevents the pressure to increase the pressure in the gearbox of Chev's Niva during its heating. In the event of a Sapunka malfunction (Capping Enclosure) is possible strong leaks through seals.
Fig.23. View of the gearbox of Chevrolet Niva from the side of the primary shaft
1 - Carter clutch; 2 - primary shaft; 3 - guide bushing of the clutch shutdown bearing; 4 - clutch shutdown bearing; 5 - clutch shutting plug
In the gearbox Chevrolet Niva there are three shafts: primary, secondary and intermediate. The primary shaft is based on two ball bearing, located in the rear end of the crankshaft and in the front wall of the gearbox crankcase (the latter perceives the bulk of the load).
In the rear end of the primary shaft, a needle bearing is installed, which is the front support of the secondary shaft and ensuring the alignment of the shafts.
The secondary shaft is also relied on the ball bearing in the rear wall of the gearbox crankcase and the roller bearing in its back cover.
The intermediate shaft of PPC Chevrolet Niva rotates in two bearings: the front - the two-row balloon is located in the front wall of the gearbox crankcase, the rear - roller is located in its back wall.
Primary shaft has two gear crowns. The osostic crown located closer to the front wall of the crankcase is in constant engagement with the front gear of the intermediate shaft (thus, these shafts always rotate together).
The sprinkled crown of the primary shaft of KPP Shevi Niva is the crown of the IV transmission synchronizer (when it turns on, the torque is transmitted directly from the primary shaft to the secondary, bypassing the intermediate, so this transmission is often called "direct"). The intermediate shaft is a block of four-axis gears.
When you turn on any transmission, except IV, the torque is transmitted to the secondary shaft through the intermediate. The gears of the intermediate shaft are in the following order (from its front end): a constant engagement gear with a primary shaft, gears III, II and I gear.
A block of two gears is attached to the rear end of the shaft: reverse (spanning) and V transmission (osostor). It additionally relies on the roller bearing in the back cover of the Chevrolet Niva gearbox.
On the secondary shaft there are driven gears III, II, I gear, reversing and V transmission (in order, counting from the front end of the shaft) and synchronizers.
The driven gears of front run gears are in constant engagement with the corresponding gears of the intermediate shaft. The gears V, III and II gear rotate on the hardened necks of the secondary shaft, gear I gear - on the sleeve.
For fixing on the secondary shaft, the drive gear gear and the hub of the synchronizer V transmission of the PPC Chevrolet Niva are used eusolvent slots. A locking ring is installed on the secondary shaft, located between the hub of the synchronizer and the drive gear V transmission.
At the same time, the gearboxes of their synchronizers were made with the dososubami gears of the front turns - spanned gears of smaller diameter. They are directed towards the corresponding synchronizer (III, I, V - Forward, II - back).
At the back end of the secondary shaft, the flange of the elastic coupling is fixed. The synchronizer consists of a hub that is rigidly fixed on the secondary shaft, a sliding clutch, a locking ring, blocking ring and springs with a washer.
The hubs of synchronizers of the III-IV and I-II gear gears of Chevrolet Niva are internal protrusions in the grooves on the secondary shaft, and the hub of the synchronizer V
The transmissions is held by the same key as driven by the reverse gear.
On the outer surface of the hubs there are slots for which the sliding coupling moves. On the couplings there are launches, in which the forks of shifting rods are included.
Blocking rings with their inner crowns are connected to the crosses of synchronizers of the PPC Chevrolet Niva corresponding gears and are fitted with springs towards the sliding couplings. The springs are based on the side surface of the slave gears through the washers.
Reverse transmission does not have a synchronizer. To enable it, you need to enter an intermediate gear of the reverse gearing with the driven gear of the secondary shaft and the drive gear gear.
The axis of the intermediate gear reverse is attached to the rear wall of the box of the box.
Removing the front bearing of the primary shaft of the gearbox of Shevi Niva
Remove the engine flywheel.
You can use the simplest puller to remove the bearing. M8 bolt 60-80 mm long insert the head into the opening of the inner ring of the bearing so that it clings to the rear edge of the ring.
We crush the M8 bolt with any rod with a diameter of 7 mm (you can use a bolt or hairpin M8, wounded or flattened to size 7 mm). On the bolt we put on the appropriate segment of the pipe (inner diameter of 36-40 mm), a large washer and naked nut.
Tightening the nut, we press the bearing.
The Bearing of the Primary Shaft PPC Chevy Niva can also be knocked out of the nest using a shock puller with a crochet, hooked for the inner ring of the bearing.
Small-grained skurt clean the planting surface under the bearing in the crankshaft flange hole.
We will prescribe a new bearing tool head, based on the outer ring of the bearing.
Replacing the primary shaft seal of Chevrolet Niva
Remove the gearbox.
We turn over one nut at the bottom of the clutch crankcase and six more nuts fastening the clutch crankcase to the gearbox.
Separate the clutch crankcase from Chevrolet Niva gearbox.
Following the mounting blade or screwdriver the gland, remove it from the jack of the guide sleeve.
Applying a thin layer of lubrication to the working surface of the new gland, we will press it with a suitable cutting pipe (outer diameter of 44 mm and internal at least 35 mm).
The assembly is carried out in reverse sequence.
The sealing gasket between the crankcases is replaced by a new and apply a thin layer of silicone sealant on it.
Replacement of the oscillet of the secondary shaft gearbox Chevrolet Niva
We remove the intermediate shaft and the rubber sealing ring from the ringer of the fastening nut of the secondary shaft flange.
We insert into the holes of the flange of the checkpoint of Shevi Niva, two bolts of fastening the elastic coupling.
We turn the flange fastening nut while holding it from turning the screwdriver inserted between two bolts.
When unscrewing the nut from the shaft sock, a centering sleeve is compressed.
We remove the nut and the puck (it is installed by the convex side to the nut).
Through a long screeching of soft metal, we put shocks along the flange, turning it.
Remove the flange. Like a screwdriver of the seal of the secondary shaft of PPC Chevrolet Niva, take it out of the cap jack.
Applying a thin layer of lubrication to the working surface of the new gland, we will compress it with a segment of the pipe or the instrumental head of a suitable size.
Disabled parts set in reverse sequence.
The centering sleeve we press the tube with a segment or the instrumental head of the appropriate size.
Mechanism of switching gearbox Chevrolet Niva
The mechanism for switching gear gear of Shevi Niva consists of a guide plate with eight rectangular cuts in the center, upper and lower washers, gear lever and its housing.
These details are torn in three bolts. The gear selection mechanism is fastened with three studs to the back cover of the box.
The neutral position of the lever between III and IV gears is set by two pairs of spring-loaded guide slats installed in the grooves of the guide plate and affect the lower end of the lever.
Fig.24. Chevrolet Chevrolet Shift Mechanism Control
1 - nut fastening of the support plate; 2 - transmission control drive control; 3 - hatch cap laying; 4 - HUNCH LOCK Gear lever; 5 - handle shift lever; 6 - gear shift lever; 7 - transmission lever case; 8 - sealing case; 9 - Screw mounting of the hatch cover; 10 - upper body shift lever; 11 - rear support; 12 - lower housing of the switching lever PPC Shevi Niva; 13 - Nut fastening rear support; 14 - rear support washer; 15 - Nut; 16 - spacer ring; 17 - stop ring; 18 - ball support housing; 19 - spring shift lever; 20 - slider ball support; 21 - Nut fastening of the body of the ball support; 22 - protective case; 23 - tip thrust; 24 - reference plate; 25 - Shevi Niva gearbox; 26 - screw fastening of the blocking stop; 27 - Reverse Lock Overlay; 28 - Nut Bolt Mounting Tie Tie; 29 - blocking emphasis; 30 - Bolt.
fastening the tip of the thrust; 31 - sleeve; 32 - remote sleeve; 33 - CHOME CHOMOR CHOMOR; 34 - Homut Bolt
The gear shift drive consists of three rods connected to forks. The turning on the front of the front turn transmission is included in the sliding clutch of synchronizers, and the plug is turned on the reverse - into the protrusion on the intermediate gear.
Random turning on the reverse transmission instead of V transmission is not possible due to the locking stop attached to the thrust tip fork and the locking pad attached on the upper body of the gearshift lever PPC Chevrolet Niva.
To enable the reverse transmission, you need to press the down lever - while the locking stop is lowered below the locking overlay. Details of the gearbox are lubricated by splashing. Primary and secondary shafts are sealed with seals.
Removing and adjusting the drive control mechanism for the selection of Chevrolet Niva
Remove the intermediate shaft. We remove the floor tunnel facing.
We turn off the handle of the shift lever and remove it along with the cover.
Remove with lever shift gearbox Chevrolet Niva protective and sealing covers.
We turn off the nutting nut of the drive control mechanism for the selection of gear to the rear support.
Under the nut, a spring and flat washers are installed, as well as a spacer sleeve.
Having unscrewed the fastening of the rear support of the power unit, lower the rear end of the gearbox of Shevi Niva.
Weaken bolt clamp tip. Screwdriver we split the clamp.
We turn over the three bolts of attachment bracket control mechanism for the gear selection mechanism to the rear gearbox cover.
Withdrawing the tip from the drive thrust hole, remove the drive of the gear selection mechanism in the collection.
To remove the rear support of the PPC drive Chevrolet Niva turn away the four nuts attaching supports to the body.
After removing the support with the spills, the screwdriver is cleaving the petals of the wire holder, and disconnect the holder from the support.
Remove the rear support of the gear selection mechanism.
Install the drive in the reverse sequence. Transmission control tube translate into neutral position.
Disassembling the control mechanism for the gearbox selection gearbox Chevrolet Niva
Remove the drive control of the gear selection mechanism.
We turn over the two bracket mounting nuts to the support plate and remove it.
Remove with spills bracket rubber dampers.
If necessary, replace the dampers new. Remove the protective rubber cover from the thrust tip.
We turn around the four bolts of fastening the housing lever gear lever PPC Chevrolet Niva.
Remove the upper (metallic) and lower (plastic) gear lever housing.
Remove the sealing gasket of the lower case.
We turn off the nut bolt bolt fastening the thrust tip to the gear lever and take out the bolt.
Remove the tip of the thrust. We take out the metal remote sleeve from the lever.
Lreaming with a screwdriver, we take two plastic bushings from the lever hole. If necessary, replace the bushings with new ones.
We turn over the three nuts fastening the ball support housing and remove the housing. Remove the spree of the lever and the sealing gasket.
We take out the gear shift lever gearboxes of Shevi Niva assembly with the slider from the support plate.
The removal of locking rings squeeze the retaining ring and remove it.
Remove the slide of the ball shift lever. Remove the lower sealing ring with the lever support.
Updoving a screwdriver, remove the top sealing ring. We remove the support from the shift lever of the gearbox of Shevi Niva.
We turn over two bolts fastening the reverse transmission lining to the upper body of the gear shift lever and remove the lining.
Cross-shaped screwdriver turn off the screw fastening of the locking stop to the fork of the tip of the thrust and remove the blocking focus.
Assembly of the drive control mechanism for the gear selection mechanism in reverse sequence. On the slider and the body of the ball support lever we apply a thin layer of plastic lubrication.
