Yanmar 4LHA-HTP Operation Manual page 601

Chapter 7 Reduction and Reversing Gear
5. Reassembly
A CAUTION
Use care in reinstalling piston rings on input shaft. Pis-
ton rings are brittle and may snap if spread too far open.
13. Reinstall piston rings on input shaft. Ensure ends of rings
are coupled as shown. Then, position rings so that ends
are staggered so no two are aligned.
INTERMEDIATE SHAFT
A WARNING
Do not touch bearing once it has been heated. Severe
burns could result. Use special protective gloves to
handle bearing.
14. Heat inner race of tapered roller bearing using a torch
lamp and press bearing onto shaft. When bearing has
cooled down.(Do Not cool with water), tap bearing care-
fully down to ensure proper seating against gear, using a
soft (copper) punch. Tap on inner race only.
15. Install tapered roller bearing on opposite end of shaft in
the same manner.
OUTPUT SHAFT
Do not touch bearing once it has been heated. Severe
burns could result. Use special protective gloves to
handle bearing.
16. Heat inner race of tapered roller bearing using a torch
lamp and press bearing onto shaft. When bearing has
cooled (Do Not cool with water), drive bearing down
against gear using a soft (copper) Punch, tapping on in-
ner race only.
17. Install tapered roller bearing on opposite end of shaft in
the same manner.
NOTE: Bearing on splined end of shaft is tapped until seated
against shoulder on shaft.
7-2-27
4LHA Seriei