Jonsered JNA19H48B, Owner'S Manual

23

TO REMOVE WHEEL FOR REPAIRS
(See Fig. 28)

•      Block up axle securely.
•         Remove axle cover, retaining ring and washers to allow 

wheel removal (rear wheel contains a square key - Do 
not lose).

•      Repair tire and reassemble.
•      On rear wheels only:  align grooves in rear wheel hub 

and axle.  Insert square key.

•      Replace washers and snap retaining ring securely in 

axle groove.

•      Replace axle cover.

NOTE: 

To seal tire punctures and prevent fl at tires due to 

slow leaks, tire sealant may be purchased from your local 
parts dealer. Tire sealant also prevents tire dry rot and 
corrosion.

TRANSMISSION REMOVAL/RE PLACE MENT

Should your transmission require removal for service or 
replacement, it should be purged after reinstallation and 
before operating the tractor.  See “PURGE TRANS MIS SION” 
in the Operation section of this manual.

SERVICE AND ADJUSTMENTS

TO AD 

JUST STEER 

ING WHEEL  ALIGN-

 MENT

If steering wheel crossbars are not horizontal (left to right) 
when wheels are positioned straight forward, remove steer-
 ing wheel and reassemble per instructions in the Assembly 
section of this manual.

FRONT WHEEL TOE-IN/CAMBER

The front wheel toe-in and camber are not adjustable on 
your tractor.  If damage has occurred to affect the front 
wheel toe-in or camber, contact your nearest authorized 
service center/department. 

CLUTCH LOCATOR

STA TION ARY
IDLER

CLUTCH ING
IDLER

ELECTRIC
CLUTCH

FIG. 26

TO REPLACE MOTION DRIVE BELT 
(See Fig. 27)

Park the tractor on level surface.  Engage parking brake.  
For assistance, there is a belt installation guide decal on 
bottom side of left footrest.
•      Remove mower (See “TO REMOVE MOWER” in this 

section of this manual.)

•      Disconnect clutch wire harness.
•      Remove clutch locator.
•      Remove belt from stationary idler and clutching idler.
•      Pull belt slack toward rear of tractor.  Carefully remove 

belt upwards from transmission input pulley and over 
cooling fan blades.

•      Pull belt toward front of tractor and remove down wards 

from around electric clutch.

•      Install new belt by reversing above procedure.

WITH PARKING BRAKE “ENGAGED”

JAM NUT

DO NOT TOUCH THIS NUT.  IF FURTHER BRAKE AD JUST MENT 
IS NECESSARY CONTACT YOUR NEAR EST AUTHORIZED SER-
VICE CENTER/DEPARTMENT

OPERATING 
ARM

NUT “A”

1-3/4"

•      Disengage transmission by placing freewheel control 

in “transmission disengaged” position. Pull freewheel 
con trol out and into the slot and release so it is held in 
the disengaged position.

The rear wheels must lock and skid when you try to manually 
push the tractor forward. If the rear wheels rotate, the brake 
needs to be adjusted or the pads need to be replaced.

TO ADJUST BRAKE
•     Depress brake pedal all the way down and en gage 

parking brake.

•      Measure distance between brake operating arm and 

nut “A” on brake rod.

•      If distance is other than 1-3/4", loosen jam nut and turn 

nut “A” until distance becomes 1-3/4".  Retighten jam 
nut against nut “A”.

•     Engage transmission by placing freewheel control in 

“trans mis sion engaged” position.

•         Road test tractor for proper stopping distance as stated 

above.  Readjust if nec es sary.  If stopping distance is 
still greater than fi ve (5) feet in high est gear, further 
main te nance is nec es sary.  Replace brake pads or 
contact a qualifi ed service center.

FIG. 27

CLUTCH
WIRE HAR NESS

TRANS MIS SION 
INPUT PULLEY