Page 2537 of 2889

(5) Remove support sleeve from carrier (Fig. 36).
(6) Remove rear thrust washer (Fig. 37).
CLEANING
Clean the transfer case parts with a standard
parts cleaning solvent. Remove all traces of sealer
from the cases and retainers with a scraper and
3MŸ all purpose cleaner. Use compressed air to
remove solvent residue from oil feed passages in the
case halves, retainers, gears, and shafts.
INSPECTION
If any pump component is worn, or damaged, the
pump must be replaced as an assembly.
Inspect the spline teeth on the synchronizer hub (Fig.
38). If evidence of chipping or excessive wear is appar-
ent, replace the hub. The hooked end of each synchro-
nizer spring should be inserted in one of the struts. In
addition, the springs should not interfere with the pol-
ished gear cone or inside diameters of the hub.
Inspect the stop ring for cracks and wear. Replace
the ring if necessary or if doubt exists over condition.
Fig. 36 Support Sleeve Removal
1 - SUPPORT SLEEVE
2 - PLANETARY CARRIER
Fig. 37 Rear Thrust Washer Removal
1 - REAR THRUST WASHER
2 - PLANETARY CARRIER
Fig. 38 Mainshaft Components
1 - DRIVE SPROCKET 5 - STRUTS
2 - STOP RING 6 - SYNCHRONIZER SPRINGS
3 - SYNCHRONIZER HUB 7 - MAINSHAFT
4 - RETAINING RING
21 - 902 TRANSFER CASE - NV241HDBR/BE
TRANSFER CASE - NV241HD (Continued)
Page 2538 of 2889

Check a replacement synchronizer ring for proper fit
on the cone with a minimum of wobble. Also check
the synchronizer struts for wear or damage.
Inspect all gear teeth and splines for wear or dam-
age. Also check splines for burrs, or nicks. Remove
minor nicks and scratches with an oil stone. Replace
any part with damaged splines.
It is recommended that all retaining rings be replaced
during overhaul. Most of the retaining rings can be dis-
torted during removal and should not be reused.
Inspect the two case halves, for cracks, porosity,
damaged mating surfaces, stripped bolt threads, or
distortion. Replace either case half if necessary. How-
ever, stripped threads can be repaired with Heli-
CoilŸ stainless steel thread inserts. The case vent
tube can be resecured with LoctiteŸ 680 if necessary.
Inspect the annulus gear. Be sure the gear teeth
are in good condition. Replace the front case and
annulus as an assembly if the gear is damaged.
Check condition of the shift fork pads (Fig. 39).
The pads should be replaced if cracked, worn, or
loose (won't stay on fork).
The shift forks, clutch and sleeve should all be
checked for wear, cracks, or any type of damage (Fig.
40). The shift sector shaft and detents should be
inspected for wear. The mode fork and shift rail are a
one-piece unit. If either part is damaged, replace the
fork and rail as an assembly. Replace the shift rail
cup and spring if they exhibit wear.Inspect the planetary thrust washers (Fig. 41)
carefully for wear or damage. Replace both washers
if necessary.
Fig. 39 Shift Fork Pads
1-PADS
2-PADS
3 - RANGE FORK
4 - MODE FORK
Fig. 40 Shift Fork Components
1 - SUPPORT SLEEVE 5 - MODE FORK AND SHIFT RAIL
2 - RANGE FORK 6 - SPRING
3 - SHIFT SECTOR 7 - CUP
4 - POPPET PLUNGER, SPRING, SCREW 8 - SLIDING CLUTCH
BR/BETRANSFER CASE - NV241HD 21 - 903
TRANSFER CASE - NV241HD (Continued)
Page 2539 of 2889

The planetary carrier cannot be disassembled. It
must be serviced as an assembly if damaged. Check
condition of the pinion teeth and PTO gear teeth. If
pinion tooth wear is evident, it will also be necessary
to check condition of the annulus gear teeth.
ASSEMBLY
BEARINGS AND SEALS
(1) Using Remover C-4210 and Handle C-4171,
drive input shaft bearing from case from inside annu-
lus gear opening (Fig. 42).
(2) Install locating ring on new bearing.
(3) Position case so that the forward end is facing
upward.
(4) Using Remover C-4210 and Handle C-4171,
drive input shaft bearing into case. The bearing
locating ring must be fully seated on case (Fig. 43).
Fig. 41 Planetary And Input Gear Components
1 - LOCK RING 6 - RETAINING RING
2 - THRUST WASHERS 7 - SUPPORT SLEEVE
3 - PLANETARY CARRIER 8 - INPUT GEAR
4 - PTO GEAR 9 - RETAINING RING
5 - BEARING
Fig. 42 Input Shaft Bearing Removal
1 - SPECIAL TOOL C-4171
2 - SPECIAL TOOL C-4210
21 - 904 TRANSFER CASE - NV241HDBR/BE
TRANSFER CASE - NV241HD (Continued)
Page 2540 of 2889

(5) Using Installer 6953, remove front output shaft
bearing.
(6) Start front shaft output bearing in case (Fig.
44). Then seat bearing with Handle C-4171 and
Installer 6953.
(7) Install front output bearing retaining ring.(8)
Install new front output seal in front case with
Installer Tool 6888 (Fig. 45) and Tool Handle C-4171 as
follows:
(a) Place new seal on tool.Garter spring on
seal goes toward interior of case.
(b) Start seal in bore with light taps from ham-
mer (Fig. 46). Once seal is started, continue tap-
ping seal into bore until installer tool bottoms
against case.
(c) Remove installer and verify that seal is
recessed the proper amount. Seal should be 2.03 to
2.5 mm (0.080 to 0.100 in.) below top edge of seal
bore in front case. This is correct final seal posi-
tion.
CAUTION: Be sure the front output seal is seated
below the top edge of the case bore as shown. The
seal could loosen, or become cocked if not seated
to recommended depth.
Fig. 43 Seating Input Shaft Bearing
1 - SNAP-RING
2 - INPUT SHAFT BEARING
Fig. 44 Front Output Bearing Installation
1 - HANDLE C-4171
2 - REMOVER/INSTALLER 6953
Fig. 45 Front Output Seal Installation
1 - SPECIAL TOOL C-4171
2 - SPECIAL TOOL 6888
Fig. 46 Checking Front Output Seal Installation Depth
1 - CORRECT SEAL DEPTH IS 2.03-2.5 mm (0.080-0.100 in.)
BELOW TOP EDGE OF BORE
2 - FRONT CASE SHAFT BORE
3 - FRONT OUTPUT SEAL
BR/BETRANSFER CASE - NV241HD 21 - 905
TRANSFER CASE - NV241HD (Continued)
Page 2541 of 2889

(9) Remove seal from front bearing retainer with
suitable pry tool.
(10) Install new oil seal in front bearing retainer
with Installer 7884 (Fig. 47).
(11) Remove seal from oil pump with suitable pry
tool.
(12) Install new seal in oil pump with Installer
7888 (Fig. 48).(13) Inspect carrier needle bearing. If bearing is
worn, rough, or damaged in any way, remove it with
a brass punch and hammer (Fig. 49).
(14) Install new needle bearing in planetary car-
rier (Fig. 50). Use Handle C±4171 and Installer 5062
to install bearing.
(15) Remove input gear pilot bearing by inserting
a suitably sized drift into the splined end of the input
gear and driving the bearing out with the drift and a
hammer (Fig. 51).
(16) Install new pilot bearing with Plug C-293-3.
(17) Remove the output shaft rear bearing with
the screw and jaws from Remover L-4454 and Cup
8148 (Fig. 52).
Fig. 47 Install Front Bearing Retainer Seal
1 - FRONT BEARING RETAINER
2 - SPECIAL TOOL 7884
Fig. 48 Install Oil Pump Seal
1 - HOUSING SEAL
2 - SPECIAL TOOL 7888
3 - OIL PUMP FEED HOUSING
Fig. 49 Carrier Needle Bearing Removal
1 - BRASS PUNCH
2 - CARRIER NEEDLE BEARING
Fig. 50 Planetary Carrier Needle Bearing Installation
1 - SPECIAL TOOL C-4171
2 - SPECIAL TOOL 5062
3 - CARRIER BEARING
21 - 906 TRANSFER CASE - NV241HDBR/BE
TRANSFER CASE - NV241HD (Continued)
Page 2542 of 2889
(18) Install new bearing with Tool Handle C-4171
and Installer 5066 (Fig. 53). The bearing bore is
chamfered at the top. Install the bearing so it is
flush with the lower edge of this chamfer (Fig. 54).
Fig. 51 Remove Input Gear Pilot Bearing
1 - DRIFT
2 - INPUT GEAR
Fig. 52 Output Shaft Rear Bearing Removal
1 - REAR CASE
2 - SPECIAL TOOL L-4454-1 AND L-4454-3
3 - SPECIAL TOOL 8148
Fig. 53 Output Shaft Rear Bearing Installation
1 - HANDLE C-4171
2 - OUTPUT SHAFT INNER BEARING
3 - INSTALLER 5066
Fig. 54 Output Shaft Rear Bearing Installation Depth
1 - BEARING (SEATED) AT LOWER EDGE OF CHAMFER
2 - CHAMFER
BR/BETRANSFER CASE - NV241HD 21 - 907
TRANSFER CASE - NV241HD (Continued)
Page 2543 of 2889
INPUT AND PLANETARY GEAR
(1) Lubricate planetary components with transmis-
sion fluid.
(2) Install first thrust washer in carrier (Fig. 55).
Lube washer with petroleum jelly before installation.
(3) Support carrier with wood blocks under PTO
gear (Fig. 56).
(4) Install support sleeve in planetary carrier. Be
sure sleeve is seated.(5) Install input gear in planetary carrier (Fig. 57).
(6) Install second thrust washer in planetary car-
rier. Be sure washer tabs are seated in carrier slots.
(7) Install lock ring (Fig. 58).
Fig. 55 Thrust Washer Installation
1 - THRUST WASHER
2 - TABS IN SLOTS
Fig. 56 Support Sleeve Installation
1 - PLANETARY
2 - SUPPORT SLEEVE
3 - WOOD BLOCKS
Fig. 57 Input Gear And Thrust Washer Installation
1 - INPUT GEAR
2 - THRUST WASHER
3 - TABS IN SLOTS
Fig. 58 Lock Ring Installation
1 - LOCK RING (BE SURE TABS ARE SEATED IN SLOTS)
21 - 908 TRANSFER CASE - NV241HDBR/BE
TRANSFER CASE - NV241HD (Continued)
Page 2544 of 2889

(8) Install retaining ring (Fig. 59).
INPUT AND PLANETARY GEAR
(1) Lubricate planetary pinions and annulus gear
with transmission fluid.
(2) Install planetary/input gear assembly in case
(Fig. 60).
(3) Start planetary pinions in low range annulus
gear. Then tap PTO gear, with hammer handle to
seat planetary pinions in annulus gear.
(4) Install retaining ring on input gear (Fig. 61).
(5) Apply bead of MopartGasket Maker, or equiv-
alent, to mating surface of input retainer. Keep
sealer bead width to maximum of 3/16 inch. Do not
use excessive amount of sealer as excess could be dis-
placed into oil channel and feed hole in case.(6) Align oil channel in retainer with oil feed hole
in front case (Fig. 62).
(7) Install retainer on input gear shaft and front
case (Fig. 63).
Fig. 59 Retaining Ring Installation
1 - RETAINING RING
Fig. 60 Planetary/Input Gear Assembly Installation
1 - WOOD/RUBBER HAMMER HANDLE
2 - PLANETARY ASSEMBLY
Fig. 61 Installing Input Gear Retaining Ring
1 - INPUT BEARING RETAINING RING
2 - SNAP-RING PLIERS
3 - INPUT GEAR
Fig. 62 Aligning Retainer Oil Channel and Case
Feed Holes
1 - FEED HOLE
2 - FRONT CASE
3 - FEED CHANNEL
4 - BEARING RETAINER
BR/BETRANSFER CASE - NV241HD 21 - 909
TRANSFER CASE - NV241HD (Continued)