MODEL 50L PLANETARY GEAR
DRIVE SERVICE MANUAL
!
WARNING: While working on this equipment, use safe lifting procedures, wear adequate clothing and wear hearing, eye and respiratory protection.
THIS SERVICE MANUAL IS EFFECTIVE:
S/N: 38489# TO CURRENT
DATE: 12-16-98 TO CURRENT
NOTE: Individual customer specifications (mounting case, output shaft, brake assembly, etc.) may vary from exploded drawing and standard part numbers shown.
If applicable, refer to customer drawing for details.
MODEL 50L
WITH CODE 4
INPUT SPLINE
ONLY
2
SINGLE PLANETARY
4:1
4.08
5:1
5.05
5:1
5.05
EFFECTIVE
FROM: S/N 16130 07-01-93
TO: (CURRENT)
RATIO
PART NUMBER
WITHOUT CODE 4
INPUT SPLINE
PART NUMBER
50-004-3003
50-004-3013
50-004-3193
50-004-4012L
50-004-4022L
50-004-4032L
50-004-4052L
50-004-4212L
50-004-4082L
50-004-4502L
50-004-4092L
50-004-4312L
50-004-4292L
WITH CODE 4
INPUT SPLINE
PART NUMBER
50-004-1173
50-004-1183
50-004-1233
50-004-1333
85-004-1392
85-004-1262
85-004-1382
85-004-1272
85-004-1292
85-004-1562
85-004-1592
50-005-2041
50-004-1062
85-004-1051
71-004-0121
01-105-0010
85-004-1572
50-004-1112
50-005-2031
50-004-1052
85-004-1041
71-004-0121
01-105-0010
85-004-1181
-
01-153-0210
85-004-1181
01-153-0210
-
50-004-1033
50-004-1011
50-004-1091
50-004-1023
50-004-1011
50-004-1091
81-004-2883
85-016-0601
01-405-0530
01-402-0560
01-102-0140
01-103-0130
01-102-0150
01-103-0140
01-150-1540
01-166-0340
01-207-0070
01-215-0010
01-216-0070
01-207-0030
50-004-1521
50-004-1452
50-004-1462
01-150-1550
01-160-0350
-
1
2
1
1
1
1
12
12
2
(1)
(1)
(1)
1
1
-
1
1
6
3
1
1
3
3
6
*
1
1
1
5
5A
5B
5C
5D
5E
5F
6
12
14A
14B
14C
16
25B
30A
30B
30C
30D
35A
35B
35C
16A
16B
20A
20B
20C
20D
25A
35D
QTY.
ITEM
1 1
1
1 3
1
2
4
D2
D3
D4
F2
H2
E
F
C
D1
C
O
D
E
A
DESCRIPTION
ROUND FLANGE (NO ZERK)
RECTANGULAR FLANGE (NO ZERK)
FLANGLESS (NO ZERK)
CUSTOM
2"DIA SHAFT-3/8" KEYWAY
23T 12/24 D.P. SPLINE
2-1/8"DIA SHAFT-1/2" KEYWAY
2"DIA SHAFT-1/2" KEYWAY
2"DIA X .50" KEY (INTERNAL)
2"HEX SHAFT-13/16 DIA.HOLE
C1
A
B
C
H3
R2
S1
S2
2-5/8"HEX SHAFT-13/16 DIA.HOLE
2"DIA AUGER-.562"HOLE
7" SPINDLE 50L (5) X 1/2-13
7" SPINDLE 50L (5) X .610 DIA THRU HOLES
SHAFT-CUSTOM
COVER-SAE 'A'
COVER-SAE 'B' 2-BOLT
COVER-SAE 'C' 4-BOLT
K
2
COVER-SAE 'C' 2-BOLT
INPUT GEAR 13T 16/32 DP SPLINE
3
4
INPUT GEAR SAE 1"-6B SPLINE
INPUT GEAR14T 12/24 DP SPLINE
5
6
INPUT GEAR 15T 16/32 DP SPLINE
INPUT GEAR 1" DIA X .25 KEY
CARRIER ASSEMBLY
CARRIER
PLANET GEAR
PLANET SHAFT
PLANET BEARING
PLANET THRUST WASHER
ROLL PIN
SUN GEAR
RING GEAR
CARRIER THRUST WASHER
INPUT THRUST WASHER
THRUST WASHER
SEAL KIT (1 SEAL, 2 O-RINGS)
3/16 X 7/8
SEAL-SHAFT
O-RING
BEARING CONE (OUTER)
BEARING CUP (OUTER)
BEARING CONE (INNER)
BEARING CUP (INNER)
HEX CAPSCREW 7/16-20 GR8
LOCKWASHER
PIPE PLUG-MAGNETIC
7/16 MED
3/8 NPT-SOC HD
GREASE FITTING (OPTIONAL) STR. 1/8 NPT
AIR VENT 3/8 NPT (OPTIONAL)
PIPE PLUG (C & K COVER ONLY) 1/8 NPT
SHIM(S)
SPLIT RING (MATCHING HALVES)
LOCK RING
RETAINING RING
2 FOR GREASE ZERK OPTION, ADD 'Z' SUFFIX TO BASE P/N
NOTES:
BEARING PRELOAD DETERMINES QUANTITY OF SHIMS.
S2 - SHAFT REQUIRES STUDS (QTY 5) PART NO. 01-164-0040.
E.C.N. # 2791
X50LD1-AF 01/15/08
35D
14C
3
4
16B
4
14A
5A
30A
30B
(OPTIONAL)
5C
5F
MATCHING
HALVES
35B
20D
25A
25B
(OPTIONAL)
30C
14B
30A
5E
5D
5B
5D
5E
12
35C
35A
20C
16B
1
20B
20A
16A
2
X50LD1-AF,
Page 1 of 1
Effective date 7-16-93
Effective serial # 16130
Model 50 service manual, SM50LD2-AB Page 2
Eskridge, Inc. Olathe, Ks. 913-782-1238 www.eskridgeinc.
com
2
MODEL 50L
3
DOUBLE PLANETARY
16.65:1
4.08
4.08
20.62:1
5.05
4.08
25.53:1
5.05
5.05
PART NUMBER PART NUMBER PART NUMBER
50-004-3003
50-004-3013
50-004-3193
50-004-4012L
50-004-4022L
50-004-4032L
50-004-4052L
50-004-4212L
50-004-4082L
50-004-4502L
50-004-4312L
50-004-4292L
85-004-1102
85-004-1122
85-004-1533
85-004-1542
85-004-1582
50-005-2041
50-004-1062
85-004-1051
85-004-1412
50-005-2011
50-004-1082
85-004-1031
50-004-1173
50-004-1183
50-004-1233
50-004-1333
85-004-1062
85-004-1112
85-004-1422
71-004-0121
01-105-0010
85-004-1181
01-153-0210
85-004-1092
50-005-2021
50-004-1072
85-004-1021
81-004-0071
01-105-0410
81-004-1561
01-153-0080
50-004-1023
50-004-1011
50-004-1091
85-016-0601
01-405-0530
01-402-0560
01-102-0140
01-103-0130
01-102-0150
01-103-0140
01-150-1550
01-166-0340
01-207-0070
01-215-0010
01-216-0070
01-207-0030
50-004-1521
50-004-1452
50-004-1462
20.62:1
4.08
5.05
1
INVERTED
RATIO
PART NUMBER QTY.
ITEM
85-004-1533
-
85-004-1582
50-005-2031
50-004-1052
85-004-1041
-
-
85-004-1072
50-005-2011
50-004-1082
85-004-1031
1
1
1
1
1
1
3
3
6
1
1
1
-
3
6
3
1
2
6
3
-
1
1
3
3
12
2
(1)
(1)
1
1
1
1
12
(1)
*
1
2
1
3
4
20A
20B
20C
20D
25A
25B
30A
30B
30C
30D
35A
35B
35C
12
14A
14B
16
16A
16B
6
7
5E
5F
7A
7B
7C
7D
7E
7F
5
5A
5B
5C
5D
C
O
D
E
EFFECTIVE
FROM: S/N 38000 11-01-98
TO: (CURRENT)
DESCRIPTION
D1
D2
D3
D4
F2
H2
H3
F
C
A
E
ROUND FLANGE (NO ZERK)
RECTANGULAR FLANGE (NO ZERK)
FLANGLESS (NO ZERK)
CUSTOM
2"DIA SHAFT-3/8" KEYWAY
23T 12/24 D.P. SPLINE
2-1/8"DIA SHAFT-1/2" KEYWAY
2"DIA SHAFT-1/2" KEYWAY
2"DIA X .50" KEY (INTERNAL)
2"HEX SHAFT-13/16 DIA.HOLE
2-5/8"HEX SHAFT-13/16 DIA.HOLE
S1
S2
7" SPINDLE 50L (5) X 1/2-13
7" SPINDLE 50L (5) X .610 DIA THRU HOLES
SHAFT-CUSTOM C1
A
B
C
K
2
3
4
5
6
COVER-SAE 'A'
COVER-SAE 'B' 2-BOLT
COVER-SAE 'C' 4-BOLT
COVER-SAE 'C' 2-BOLT
INPUT GEAR 13T 16/32 DP SPLINE
INPUT GEAR SAE 1"-6B SPLINE
INPUT GEAR 14T 12/24 DP SPLINE
INPUT GEAR 15T 16/32 DP SPLINE
INPUT GEAR 1" DIA X .25 KEY
CARRIER ASSEMBLY
CARRIER
PLANET GEAR
PLANET SHAFT
PLANET BEARING
PLANET THRUST WASHER
ROLL PIN 3/16 X 7/8
SUN GEAR
CARRIER ASSEMBLY
CARRIER
PLANET GEAR
PLANET SHAFT
PLANET BEARING
PLANET THRUST WASHER
ROLL PIN 1/8 X 1
RING GEAR
CARRIER THRUST WASHER
INPUT THRUST WASHER
SEAL KIT (1 SEAL, 2 O-RINGS)
SEAL-SHAFT
O-RING
BEARING CONE (OUTER)
BEARING CUP (OUTER)
BEARING CONE (INNER)
BEARING CUP (INNER)
HEX CAPSCREW
LOCKWASHER
PIPE PLUG-MAGNETIC
7/16-20 GR8
7/16 MED
3/8 NPT-SOC HD
GREASE FITTING (OPTIONAL) STR. 1/8 NPT
AIR VENT 3/8 NPT (OPTIONAL)
1/8 NPT PIPE PLUG (C & K COVER ONLY)
SHIM(S)
SPLIT RING (MATCHING HALVES)
LOCK RING
NOTES:
1
INVERTED RATIO SUNGEAR IS NOT COUNTERBORED FOR CODE 4 INPUT. MOTOR COMPATIBILITY MUST BE VERIFIED.
16B
4
7A
6
14A
5A
30A
30B
(OPTIONAL)
2 FOR GREASE ZERK OPTION, ADD 'Z' SUFFIX TO BASE P/N
BEARING PRELOAD DETERMINES QUANTITY OF SHIMS.
S2 - SHAFT REQUIRES STUDS (QTY 5) PART NO. 01-164-0040.
X50LD2-AE,
E.C.N. # 2791
Page 1 of 1
Effective date 12-16-98
Effective serial # 38489
7F
5C
25A
25B
(OPTIONAL) 30C
14B
30A
7C 7E
7D
7B
5F
7E
5E
5D
5B
5D
5E
12
35C
MATCHING
HALVES
35B
35A
20C
20D
16B
1
20B
20A
16A
2
Model 50 service manual, SM50LD2-AB Page 1
Eskridge, Inc. Olathe, Ks. 913-782-1238 www.eskridgeinc.
com
LUBRICATION & MAINTENANCE
Using the chart below, determine an appropriate lubricant viscosity. Use only EP (extreme pressure) or API GL-5 designated lubricants.
Change the lubricant after the first 50 hours of operation and at 500 hour intervals thereafter. The gear drive should be partially disassembled to inspect gears and bearings at 1000 hour intervals.
Recommended ambient and operating temperatures for conventional and synthetic gear lubricants
-50 -25 0 25 50 75 100 125 150 175 200 225 250 F
80W90 conventional
75W90 conventional
85W140 conventional
Max Operating temp Min Ambient/operating temp Max Ambient temp
75W90 synthetic
80W140 synthetic
-45 -32 -18 -4 10 24 38 52 66 79 93 107 121 C
Note: Ambient temperature is the air temperature measured in the immediate vicintiy of the gearbox. A Gearbox exposed to the direct rays of the sun or other radiant heat sources will operate at higher temperatures and therefore must be given special consideration. The max operating temp must not be exceeded under any circumstances, regardless of ambient temperature.
If your unit was specified “shaft up” or with a “-Z” option, a grease zerk was provided in the base housing. For shaft-up operation, the output bearing will not run in oil and must be grease lubricated. Use a lithium based or general purpose bearing grease sparingly every
50 operating hours or at regular maintenance intervals. Over-greasing the output bearing should be avoided as it tends to fill the housing with grease and thicken the oil
ESKRIDGE MODEL 50 OIL CAPACITIES
Operating Position
Horizontal Shaft
Vertical Shaft (Pinion Up)
Vertical Shaft (Pinion Down)
Single stage
1.4 pt / 0.7 l
1.7pt / 0.8 l
2.2pt / 1.0 l
Oil Capacity
Double stage
1.6 pt / 0.8 l
2.2 pt /1.0 l
2.7 pt /1.3 l
Triple stage
1.8 pt / 0.9 l
2.7 pt /1.3 l
3.2 pt /1.6 l
Oil Level
To horizontal centerline of gear drive
To side port on gear drive base
To midway on upper/ primary gear set
ESKRIDGE PART NUMBER INTERPRETATION
Note: All non-custom Eskridge Geardrives are issued a descriptive part number which includes information regarding the Model, means of shaft retention, base style, shaft style, input mounting, input shaft size, overall ratio and various available options. For a detailed breakdown of this information, please refer to Eskridge product specification sheets found at: http://www.eskridgeinc.com/geardrives/gearprodspecs.html
Model 50 service manual, SM50LD2-AB Page 2
Eskridge, Inc. Olathe, Ks. 913-782-1238 www.eskridgeinc.
com
Unit Teardown
1) Scribe a diagonal line across the outside of the unit from the cover (3) to the base (1) before disassembly to aid in the proper positioning of pieces during reassembly.
2) Remove drain plugs (30A) and drain oil from unit. The oil will drain out more quickly and completely if warm.
3) Remove the 12 7/16-20 capscrews (25A) and lockwashers
(25B) securing the cover.
4) Remove the cover (3) , thrust washer (14B) , and input gear (4) .
Inspect o-ring (16B) ; discard if damaged or deformed.
5) Lift the planet carrier assembly out of the unit .
gear(s) and subsequent carrier assemblies and thrustwasher (14A) . Inspect gear to gear and gear to base
O-ring(s) (16B) ; as before, discard if damaged or deformed.
7) The unit is now disassembled into groups of parts. the area(s) requiring repair should be identified by thorough inspection of the individual components after they have been cleaned and dried.
Carrier Assembly Teardown
Rotate planet gears (7B pri/5B sec) to check for abnormal noise or roughness in bearings (7D pri/5D sec). If further inspection or replacement is required, proceed as follows.
segments (35B) and shims (35A) .
Caution: Since the shaft is no longer positively retained, care should be taken to avoid personal injury. Care should also be taken not to damage it while pressing through base.
Note: Removing the shaft from the base assembly damages the shaft seal. The seal will need to be replaced.
base external side down, supported at the case perimeter. Press output shaft out bottom of base by applying a load to internal end of shaft until it passes through inner shaft bearing cone (20C) .
3) A gear puller may be used to remove the outer bearing cone (20A) from the shaft (2) . If reusing old bearing cone, do not pull on or damage roller cage. If shaft bearings show evidence of wear or damage they should be replaced at this time. Remove the shaft seal (16A) for inspection or replacement.
Note: When installing new shaft bearings. press the bearing cone onto output shaft by pressing on inner race only. DO
NOT press on roller cage, as it will damage the bearing.
4) Lubricate inner lip of new shaft seal (16A) and slide it onto the shaft (2) until it fits snugly over the shaft seal diameter with the open side toward the interior of the gear drive.
5) Inspect inner and outer bearing cups (20D & 20B) . If cups are damaged, drive them out using a brass drift and utilizing the bearing knock-out notches in the base (1)
1) Drive roll pins (7F pri/5F sec) completely into the planet shafts
(7C pri/5C sec) .
2) Slide planet shafts (7C pri/5C sec) out of carrier (7A pri/5A sec) .
3) Remove planet gears (7B pri/5B sec) , washers (7E pri/5E sec) and bearings (7D pri/5D sec) from carrier (7A/5A) .
4) Inspect the planet gear (7B pri/5B sec), bearing bore and planet shaft (7C pri/5C sec) and bearings (7D pri/5D sec) . Check for spalling, bruising or other damage and replace components as necessary.
5) Remove roll pins (7F pri/5F sec) from planet shafts (7C pri/5C sec) using a 1/8” (pri) or 3/16” (sec) pin punch.
Carrier Reassembly
shafts should be installed with chamfered end of 1/8”(pri), or 3/16”(sec) roll pin hole towards outside diameter of carrier (7A pri/5A sec) ; this will ease alignment of holes while inserting roll pins (7F pri/5F sec) .
2) Drive roll pin (7F pri/5F sec) into the carrier hole and into planet shaft to retain parts. Repeat for remaining planet gears.
Base Subassembly Teardown
1) Remove the shaft retainer lock ring (35C) using a heel bar or puller; if using a heel bar, be sure not to pry against the cage of the inner output shaft bearing (20C) . Remove the split ring
Base Reassembly
1) Clean all foreign material from any magnetic oil plugs located on base (1) .
2) Place base exterior side up on work table.
3) Apply a layer of lithium or general purpose bearing grease to the roller contact surface of outer bearing cup (20B) .
4) Press outer bearing cone (20A) onto the shaft until it seats against the shoulder.
5) Place the shaft (2) with the bearing cone (20A) into the base.
6) Flip shaft/base assembly, and apply lithium or general purpose bearing grease to roller contact surface of the inner cup (20D) , then press inner bearing cone (20C) onto shaft until it seats against inner bearing cup (20D) .
7) Prior to installation of the shaft seal (16A) , the preload may result in a rolling torque which varies between 50 to 80 in-lb. The bearing preload should be tailored to your application; a low-speed application may require a high pre-load, while high-speed applications usually benefit from low pre-load. Adding shims (35A) will increase the pre-load on the bearing set. Determine your pre-load requirement and install shims to obtain this preload.
8) Install the Load-N-Lock™ segments (35B) over the shims
Model 50 service manual, SM50LD2-AB Page 3
Eskridge, Inc. Olathe, Ks. 913-782-1238 www.eskridgeinc.
com
(35A) and into the groove in the shaft (2) . Then, install the lock ring (35C) over the segments (35B) .
All subassembly service or repairs should be complete at this time. Continue to Unit Reassembly to complete unit buildup.
.
Unit Reassembly
1) Install the secondary carrier assembly (5) onto the output shaft
(2) ; align the splines of the carrier (5A) with the output shaft (2) splines and slide the carrier onto the shaft.
o-rings and install into the corresponding base
(1) and cover (3) pilot(s).
Caution: Hold ring gear(s) by outside diameter or use lifting device to avoid injury.
3) Align gear teeth of the ring gear (12) with the gear teeth of the planet gears (5B) and place on base (1) , then align mounting holes of ring gear (12) with holes in base (1) . Use the scribed line made during disassembly for reference.
4) Install the carrier thrust washer (14A) and sun gear (6) into the secondary carrier (5A) .
5) Install the primary carrier assembly (7) .
6) Install the input gear (4) .
7) Install the input thrust washer (14B) Refer to exploded view for details.
8) Noting the scribed line made during disassembly, (with lubricated o-ring in place) align and install the cover (3) .
9) Install and torque the 12 7/16-20 hex-head cap-screws (25A) with lockwashers (25B) . The torque for the cap-screws: 80 ft-lb dry, 60 ft-lb if lubricated.
10) Using a splined shaft to drive the input gear (4) ensure that the unit spins freely.
11) Fill the unit to the proper level, as specified, with recommended gear oil (refer to chart, page 2) after unit is sealed with brake and/or motor.
The gearbox is now ready to use.
Model 50 service manual, SM50LD2-AB Page 4
Eskridge, Inc. Olathe, Ks. 913-782-1238 www.eskridgeinc.
com
