Doosan DISD SD 310, Shop Manual

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SCHEDULED MAINTENANCE
Oil of new drive axle must be replaced after working for 15 days (about 100 working hours), oil shall be
replaced once after working for every six months (about 1200 working hours) in following days.
Every month maintenance
：
1
．
Check abrasion condition of brake disc, if there is disruptive abrasion; please handle in time if there
is any.
2
．
Check abrasion condition of brake block to guarantee separation and reunion of brake caliper is
flexible; it shall be replaced in time when brake block is wearing close to abrasion line (at the bottom
of groove).
3
．
Check if oil level of shell complies with requirements, please add new oil if the oil level descends.
4
．
Keep axle clean, keep vent pipe smooth, and avoid silt going into axle. Check loosening condition of
all fasteners, especially rim nuts, if it is loosed, please refasten again.
Every half year maintenance
：
Lubrication oil in axle shall be replaced every half a year, different brands of lubrication oil shall be
adopted for different areas and seasons. Please refer to 4.2 for oil replacing method.
Every year maintenance
：
Overhaul checking every working year:
1
．
Check the gap, mesh and abrasion condition of spiral bevel gear of main reducer.
2
．
Check abrasion condition of differential mechanism gear.
3
．
Check abrasion condition of hub gear.
4
．
Check abrasion condition of needle bearing of hub planetary gear.
5
．
Requirements of installation and debugging items after overhaul checking:
1
）
After assembling, axle shaft gear and bevel gear shall move flexibly with hand touching rather than
locking. The Min. gear backlash of gear is 0.18-0.23mm. Tooth length and tooth height of
contacting area of two gears cannot be less than 50%.
2
）
In order to guarantee enough bearing rigidity of active spiral gear, before assembling oil seal and
sealing cover, adopt gradually reducing spacer shim between wo tapered roller bearing to give
1.0-1.5N.m preloaded torque to roller bearing.
3
）
Gear backlash between the driving and driven spiral bevel gear is 0.25-0.45mm, the changing
amount cannot be more than 0.15mm, gear backlash can be realized through adjusting nuts of
both sides of differential mechanism and spacer shim of bearing sleeve. Tooth surface contacting
area shall guarantee direction of tooth length and tooth height is not less than 50%, contacting
position shall be at the middle side of tooth surface and closer to the smaller side.
4
）
Adjusting of bearing clearance of shell at both sides of drive axle: Fasten adjusting nuts, give 28-
38N.m preload to shell roller bearing, and then lock two round nuts with screw fastening
Front Axle SPC000009
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