DEALER SERVICE Cont’d
Assemble U-Joint
1.Place seals securely on bearing cups. Insert cup into yoke from outside and press in with hand pres- sure as far as possible.
2.Insert journal cross into bearing cup with grease fitting away from the shaft. Be careful not to disturb needle bearings.
3.Insert another bearing cup directly across from first cup and press in as far as possible with hand pressure.
4.Trap cups in vise and apply pressure. Be sure journal cross is started into bearings and continue pressure with vise, squeezing in as far as possible. Tap yoke to aid in process.
5.Seat cups by placing a drift or socket (slightly smaller than the cup) on cup and rapping with a ham- mer. See Figure 18.
6.Install snap ring and repeat on opposite cup.
CD1389
7.Repeat steps 1 and 2 to install remaining cups in remaining yoke.
Figure 18
8.Move both yokes in all directions to check for free movement. Should movement be restricted, rap on yokes sharply with a hammer to relieve any tension. Repeat until both yokes move in all directions without restriction.
GEARBOX MAINTENANCE
Read this complete section before starting any repair. Many steps are dependent on each other.
Gearbox bearings, gears, and shafts have an interfer- ence press fit. Gearbox repair is limited to seal, gas- ket, and vent plug replacement.
Always maintain correct gear lube level in gearbox. Be sure proper vent plug is installed.
Troubleshooting is an important part of gearbox main- tenance. Check for leakage and bad bearings.
Leakage is a very serious problem and must be cor- rected immediately or damage to gearbox and belt will result. Remove gearbox from mower to repair leakage problems.
Leakage may be caused by a vent plug not venting. To check vent plug operation, remove plug and apply low air pressure to opening in side of plug. Check to make sure it is venting out of the top.
Operating gearbox with improper lube level may also cause seals to leak. Also check for housing cracks. If any of these conditions exist, correct them, clean area where leakage was evident, return mower to service, and check to make sure leakage has been stopped.
Bearing maladjustment or failure is indicated by noise and excessive side and end play in gear shafts. If this is indicated, replace the gearbox.
24 Dealer Service | MAN0137 (9/14/01) |
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