Gear Changing In The Transmission With The Synchromesh Gb And Synchromesh Increasing Gearbox - Belarus 921.6 Operator's Manual

ATTENTION:FOURTH GEAR OF THE GB CAN BE ACTIVATED ONLY WHEN THE
GB II RANGE IS ACTIVATED!
ATTENTION: CHANGE THE GB GEARS AND RANGES ONLY WHEN THE TRAC-
TOR IS STOPPED AND THE CLUTCH PEDAL IS FULLY PRESSED DOWN! WHILE
TRANSPORTATION WORKS PERFORMING IT IS ALLOWABLE TO CHANGE GEARS
WHILE MOVING FROM THE SECOND TO THE THIRD AND FROM THE THRIRD TO THE
SECOND WITHING THE I AND II RANGES, AS WELL AS FROM THE SECOND TO THE
FOURTH, FROM THE FOURTH TO THE SECOND, FROM THE THIRD TO THE FOURTH
AND FROM THE FOURTH TO THE THIRD WITHING THE II RANGE. CHANGE GEARS
WHEN THE TRACTOR IS COASTING AND WITH FULY DEPRESSED CLUTCH COUPLING!
ACTIVATION AND DEACTIVATION OF THE FIRST GEAR, CHANGING TO THE FIRST
GEAR FROM HIGHER GEAR, ACTIVATION AND DEACTIVATION OF THE REVERSE
MOVEMENT GEAR SHALL BE PERFORMED ONLY WHEN THE TRACTOR IS COM-
PLETELLY STOPPED AND WITH FULY DEPRESSED CLUTCH COUPLING PEDAL!
ATTENTION: CHANGE THE STAGES OF THE SYNCHROMESH REDUCING GEAR-
BOX ON ANY GB GEAR ONLY WHEN THE TRACTOR IS COMPLETELLY STOPPED AND
WITH FULY DEPRESSED CLUTCH COUPLING PEDAL! WHILE TRANSPORTATION
WORKS PERFORMING IT IS ALLOWABLE TO CHANGE THE STAGES OF THE SYN-
CHROMESH REDUCING GEARBOX WHILE MOVING. CHANGE GEARS WHEN THE
TRACTOR IS COASTING AND WITH FULY DEPRESSED CLUTCH COUPLING PEDAL!
2.15.3 Gear Changing in the Transmission with the Synchromesh GB and
Synchromesh Increasing Gearbox.
Controls of the synchromesh GB with the synchromesh increasing gearbox are shown
in Figure 2.15.4 .
Gears are changed by two levers: GB ranges and gears changing lever 3 (Figure 2.15.4) and
increasing gearbox control lever 2.
Select required ranges, gears and stages of the increasing gearbox (slow-down stage – "tur-
tle" symbol, accelerating stage – "rabbit" symbol) according to the changing diagrams 4 and 1 as
shown in Figure 2.15.4.
Change ranges and gears by the single lever 3, at that, activate the range (I or II) first,
then move the lever into position N and select required gear.
The increasing gearbox control lever 2 shall be in activated (fixed) position during the tractor
operation: reverse – slow-down stage (turtle) or forward – accelerating stage (rabbit). It is allowable
to keep the lever of the increasing gearbox in the neutral (not fixed middle position) position in order
to make the engine starting easier at low temperatures.
1 – GB increasing gearbox stages changing diagram; 2 – GB increasing gearbox con-
trol lever; 3 – GB ranges and gears changing lever; 4 – GB ranges and gears changing dia-
gram.
Figure 2.15.4 – Synchromesh GB with the synchromesh increasing gearbox control
47
921.6-0000010 OM