Elliott Digger Derrick, Руководство по эксплуатации и техническому обслуживанию, Страница: 344 / 376

Model 75 service manual, SM75_0413 Page 4
eskridge, inc. olathe, KS. 913-782-1238 www.eskridgeinc.com
unit Disassembly Procedure
1) Scribe a diagonal line across the outside of the unit from
the bail (15) to the base (1) before disassembly to aid in the
proper positioning of pieces during reassembly.
2) Remove magnetic drain plug (14a) and drain oil from unit.
The oil will drain out faster and more completely if warm.
3) Remove the twenty hex-head capscrews (13a) and
flat washers (13c) .
4) Separate bail (15) from cover (4) and remove from digger
assembly.
5) Remove hex-head capscrews (13b) and lockwashers (13D)
and remove motor (17) from cover (4) .
6) Remove cover (4) , thrust washers (10b & 10a) , and input gear
(5) . Inspect o-ring (11b) ; discard if damaged or deformed.
7) Lift Stage I planet carrier assembly (6) out of the unit
Remove ring gear (2) and inspect o-ring (11b) ; discard if
damaged or deformed.
8) Remove secondary sun gear (9) and thrust washer (10a) .
9) Lift the Stage II planet carrier assembly (7) out of the unit.
10) Remove the Stage II ring gear (3) . Inspect o-ring (11b) ; as
before, discard if damaged.
11) The unit is now separated into subassemblies. The area(s)
requiring repair should be identified by thorough inspection
of the individual components after they have been cleaned
and dried.
Stage i
carrier Subassembly
(items 6a, 6b, 6c, 6D, 6e & 6f)
Disassembly
1) Rotate planet gears (6b) to check for abnormal noise or
roughness in bearings (6e) or planet shafts (6c) . If further
inspection or replacement is required, proceed as follows.
noTe: Support only the carrier (6a) while pressing out planet
shafts.
2) Drive roll pins (6f) completely into the planet shafts (6c) .
3) Press or drive planet shafts
(6c)
out of carrier
(6a)
.
4) Remove planet gears (6b) and thrust washers (6D) from the
carrier (6a).
5) Inspect the planet gear (6b) bearing bore, planet shaft (6c)
and bearings (6e) . Check for spalling, bruising or other dam-
age. Replace components as necessary.
6) Check primary planet shafts (6c) for any abnormal wear,
especially ones where bearings needed to be replaced.
If any abnormal wear is found, replace planet shafts.
7) Use 3/16 inch pin punch to remove roll pins (6f) from planet
shafts (6c) .
noTe: if either the bearings or the planet shafts (pins) are
damaged, both components should be replaced.
reassembly
1) Install bearing (6e) into planet gear (6b) . Place one thrust
washer (6D) on each face of the planet gear. Install gear
assembly into carrier (6a) .
2) Planet shafts (6c) should be installed with chamfered end of
3/16 inch hole toward outside diameter of the carrier (6a) .
This will aid in alignment of holes while inserting roll pins
(6f) .
3) Drive a roll pin (6f) through the carrier hole and into the planet
shaft to retain the parts. Repeat for other planet gears.
Stage ii
carrier Subassembly
(items 7a, 7b, 7c, 7D, 7e, 7f, & 7g)
Disassembly
1) Rotate planet gears (7b) to check for abnormal noise or
roughness in bearings (7e & 7f) . If further inspection or
replacement is required, proceed as follows.
2) Drive roll pins (7g) completely into the planet shafts (7c) .
3) Slide planet shafts (7c) out of carrier (7a) .
4) Remove planet gears (7b) , washers (7D) and bearings (7e &
7f) from carrier (7a) .
5) Inspect the planet gear (7b) bearing bore, planet shaft (7c)
and bearings (7e & 7f) . Check for spalling, bruising or other
damage. Replace components as necessary.
6) Remove roll pins (7g) from primary planet shafts (7c) using
a 3/16 inch pin punch.
6A
6C
6D
6E
6B
6D
6F
7A
7C
7D
7F
7E
7B
7D
7G