Caterpillar Cat 990K Wheel Loader (Prefix A9P) Service Repair Manual (A9P00001 and up)

1
Shutdown SIS
Previous Screen
Product WHEEL LOADER Model 990K WHEEL LOADER
A9P Configuration 990K Wheel Loader A9P00001-UP
(MACHINE) POWERED BY C27 Engine
Disassembly and Assembly 990K Wheel Loader and
844K Wheel Dozer Machine Systems Media Number
-UENR6576-05 Publication Date -01/01/2018
Date Updated -26/01/2018
i07518348
Piston Pump (Steering) - Assemble SMCS -
4306-016-QP 5070-016-ZH Assembly
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 439-3939 Link Bracket 2
B 163-5006 Spring Clip 2
C 171-1113 Measuring Hub 1
D 129-3876 Measuring Bell 1
E - Height Gauge 1
F 171-1112 Test Pins 3
G 171-1114 Alignment Plug 1
H 6V-2055 Grease 1
J - Loctite 263 -
2
Illustration 1 g06152922 1. Install retaining
ring (61) and bearing (62) onto shaft assembly
(60).
Illustration 2 g06153863 2. Use a soft faced
hammer to install shaft (60) into housing (30).
Illustration 3
g06153868
3
Illustration 4 Note the orientation of lip seals
(59).
g06153871
3. Install lip seals (59) and the O-ring seals
and into cover (58).
Illustration 5
g06153874
4. Install cover (58) and bolts (57).
Illustration 6
g06146430
5. Install outer races (56) into housing (30).
4
Illustration 7
g06153879
6. Install pins (54) onto swashplate (53).
Illustration 8
g06153884
Illustration 9
g06153889
5

1. Install bearings (55) to swashplate (53). Use
   Tooling (B) to hold the bearings in place for
   installation.
2. Install swashplate (53) and remove Tooling (B).

Illustration 10 g06153892 9. Install retainers
(51), plugs (52) and the O-rings. Repeat for
opposite side. Note Ensure retainers (51) lock
into pins (54) shown in illustration 7..
Illustration 11 g06153894 10. Install adjustment
screw (50) into housing (30). Repeat for opposite
side.
6
https//www.aservicemanualpdf.com/ My Dear
Friend! Thank you very much for visiting. Full
manual if required, please enter the following
URL into your browser. https//www.aservicemanual
pdf.com/
7
Illustration 12 g06153856 11. Place port plate
(31) on a flat surface and install Tooling (G).
Illustration 13
g06149897
12. Install Tooling (F) into bearing (49).
Illustration 14
g06149905
13. Install shims (47) into bearing (49).
Illustration 15
g06149911
8
14. Install bearing (49) onto barrel (44).

• Illustration 16 g06153902
• Dimension (X) is 220.95 - 221.20mm (8.698 - 8.708
  inch) Dimension (Y) is 170.95 - 171.20mm (6.730-
  6.740 inch)
• Install barrel assembly (44) onto port plate
  (31). Install retainer plate (46) onto barrel
  assembly (44). Install Tooling (C) and (D) onto
  retainer plate (46).
• Use Tooling (G) to measure dimensions (X) and
  (Y). Adjust the shims under retainer plate
• (46) as necessary to achieve the dimensions shown
  in Illustration 16.
• Remove Tooling (C) and (D). Remove retainer plate
  (46) from barrel assembly (44). Remove barrel
  assembly (44) from port plate (31).

Illustration 17
g06149911
18. Remove bearing (49) from barrel (44).
9
Illustration 18
g06149905
19. Remove shims (47) from bearing (49).
Illustration 19
g06149897
20. Remove Tooling (F) from bearing (49).
Illustration 20
g06149972
10
Illustration 21 g06149905 21. Apply Tooling (H)
to springs (48). Install springs (48) and shims
(47) into bearing (49).
Illustration 22
g06149911
22. Install bearing (49) onto barrel (44).
Illustration 23 g06146401 23. Install retainer
plate (46) and pistons (45) into barrel (44).
11
Illustration 24 g06146790 24. Rotate housing
(30) to a horizontal position. Use a suitable
string to install barrel assembly (44) into
housing (30).
Illustration 25 g06146314 25. Apply Tooling (J)
to bolts (42). Install retainer (43) and bolts
(42). Repeat for opposite side. Note Bolts (42)
should be replaced with new bolts.
Illustration 26 g06146295 26. Install cover
(41). Repeat for opposite side.
12
Illustration 27
g06154614
Illustration 28 g06154626 27. Install O-ring
seal (39). Install rods (40) and (38). Install
piston (37), spring (36), spring (35), and
piston (34).
Illustration 29 g06153915 28. Install bushing
(33) and bearing (32) into head (29). Apply
Tooling (H) to port plate (31) and install into
head (29).
13
Illustration 30
g06146219
Improper assembly of parts that are spring loaded
can cause bodily injury. To prevent possible
injury, follow the established assembly procedure
and wear protective equipment.
29. Attach Tooling (B) and a suitable lifting
device to head (29). Install head (29) onto
housing (30).
Illustration 31 g06146174 30. Install bolts
(28). Tighten bolts (28) to a torque of 780 78
Nm (575 58 lb ft). Install plug (27) and the
O-ring seal. Tighten plug (27) to a torque of 198
20 Nm (146 15 lb ft).
14
Illustration 32
g06146164
Illustration 33 g06146158 31. Install plugs
(26), (25), and the O-ring seals.
Illustration 34
g06153150
32. Install retaining ring (24A).
15
Illustration 35 g06153932 33. Install impeller
(23) and retaining ring (24).
Illustration 36 g06145926 34. Install adapter
(22) and the O-ring seal. Install bolts (21).
Illustration 37 g06145925 35. Install adapter
(20) and the O-ring seal. Install bolts (19).
Install coupler (18).
16
Illustration 38
g06145907
Improper assembly of parts that are spring loaded
can cause bodily injury. To prevent possible
injury, follow the established assembly procedure
and wear protective equipment.

1. Install spool (11), guide (12), spring (13),
   spring (14), guide (15), O-ring seal (16), and
   valve (17).
2. Install spool (5), guide (6), spring (7), guide
   (8), O-ring seal (9), and valve (10).

Illustration 39
g06145896
38. Install O-ring seals (4).
17
Illustration 40
g06145891
39. Install valve (2) and bolts (3).

• Illustration 41 g06145889
• Install plug (1) and the O-ring seal. Remove the
  piston pump from Tooling (A).
• End By
• a. Install the piston pump.

Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Tue Nov 23 173333 UTC0800 2021
18
Shutdown SIS
Previous Screen
Product WHEEL LOADER Model 990K WHEEL LOADER
A9P Configuration 990K Wheel Loader A9P00001-UP
(MACHINE) POWERED BY C27 Engine
Disassembly and Assembly 990K Wheel Loader and
844K Wheel Dozer Machine Systems Media Number
-UENR6576-05 Publication Date -01/01/2018
Date Updated -26/01/2018
i06545830

• Gear Pump (Secondary Steering) - Remove and
  Install
• SMCS - 4324-010-GT 4324-010 5073-010-SST
  5073-010
• Removal Procedure
• Start by
• Connect the steering frame lock.
• Release the hydraulic system pressure.
• NOTICE
• Care must be taken to ensure that fluids are
  contained during performance of inspection,
  maintenance, testing, adjusting, and repair of
  the product. Be prepared to collect the fluid
  with suitable containers before opening any
  compartment or disassembling any component
  containing fluids.
• Refer to Special Publication, NENG2500, "Dealer
  Service Tool Catalog" for tools and supplies
  suitable to collect and contain fluids on Cat
  products.
• Dispose of all fluids according to local
  regulations and mandates.

Hot oil and hot components can cause personal
injury. Do not allow hot oil or hot components
to contact skin.
19
Note Check the O-ring seals, the gaskets, and
the seals for wear or for damage. Replace the
components, if necessary. Note Cleanliness is
an important factor. Before assembly, thoroughly
clean all parts in cleaning fluid. Allow the
parts to air dry. Do not use wiping cloths or
rags to dry parts. Lint may be deposited on the
parts which may cause trouble. Inspect all parts.
If any parts are worn or damaged, use new parts
for replacement. Dirt and other contaminants can
damage the precision component. Perform assembly
procedures on a clean work surface. Keep
components covered and protected always. 1.
Drain the transmission oil into a suitable
container for storage or disposal. Refer to
Operation and Maintenance Manual, "Transmission
Oil - Change". Drain enough oil to bring the oil
level below the secondary steering pump.
Illustration 1 g00346175 2. Disconnect hose
assemblies (2) from secondary steering pump (3).
Illustration 2 g00346174 3. Remove nuts (4) and
secondary steering pump (3).
20
Illustration 3
g00346176
4. Remove gasket (5) from the pump
drive. Installation Procedure 1. Install
secondary steering pump (3) in the reverse order
of removal.
Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Tue Nov 23 173430 UTC0800 2021
21
Shutdown SIS
Previous Screen
Product WHEEL LOADER Model 990K WHEEL LOADER
A9P Configuration 990K Wheel Loader A9P00001-UP
(MACHINE) POWERED BY C27 Engine
Disassembly and Assembly 990K Wheel Loader and
844K Wheel Dozer Machine Systems Media Number
-UENR6576-05 Publication Date -01/01/2018
Date Updated -26/01/2018
i00761547
Gear Pump (Secondary Steering) - Disassemble SMCS
- 4324-015-GT 5073-015-SST Disassembly
Procedure Start By a. Remove the secondary
steering pump. Refer to Disassembly and Assembly,
"Gear Pump (Secondary Steering) - Remove".
Illustration 1 g00346187 1. Remove bolts (1) and
the washers. Remove body (2) from the secondary
steering pump.
22

• Illustration 2 g00346188
• Remove two pistons (3) and two springs from body
  (2).
• Remove two seals (4) from body (2).

Illustration 3 g00346189 4. Remove spacer (5)
from body assembly (6).
Illustration 4
g00346190
5. Remove two spacers (7) from spacer (5).
23
Illustration 5 g00346191 6. Remove two pistons
(8) and two springs (9) from body assembly (6).
Illustration 6 g00346232 7. Remove two seals
(10) from body assembly (6).
Illustration 7 g00346233 8. Remove bolts (11)
and the washers from flange assembly (12). Remove
flange assembly (12) from body assembly (6).
24
Illustration 8 g00346234 9. Remove seal (13)
from flange assembly (12).
Illustration 9
g00346235
10. Remove seals (14) from bushings (15).
Illustration 10 g00346236 11. Remove two dowels
(16) and two bushings (15) from flange assembly
(12).
25
Illustration 11 g00346237 12. Remove two lip
seals (17) and the ring from flange assembly (12).
Illustration 12
g00346239
Illustration 13 g00346240 13. Remove two metal
seals (18) and five plastic seals (19) from body
assembly (6).
26
Please write to us. Our email
aservicemanualpdf_at_yahoo.com Please go to the
homepage to get the full manual, or other brand
PDF manuals. Home Site aservicemanualpdf.com
27
Thank you very much for your reading. Please
Click Here. Then Get COMPLETE MANUAL. NO WAITING
GET MORE OTHER MANUALS
https//www.aservicemanualpdf.com/
NOTE If there is no response to click on the
link above, please download the PDF document
first and then click on it.
GET MORE OTHER MANUALS
https//www.aservicemanualpdf.com/
28
Illustration 14 g00346241 14. Remove plate (20)
from body assembly (6).
Illustration 15 g00346242 15. Remove shaft (21)
and gear (22) from body assembly (6).
Illustration 16 g00346243 16. Remove plate (23)
from body assembly (6).
29
Illustration 17
g00346244
Illustration 18 g00346245 17. Remove two metal
seals (24) and five plastic seals (25) from body
assembly (6).
Illustration 19 g00346246 18. Remove seals (26)
from bushings (27). Remove bushings (27).
Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Tue Nov 23 173527 UTC0800 2021
30
Shutdown SIS
Previous Screen
Product WHEEL LOADER Model 990K WHEEL LOADER
A9P Configuration 990K Wheel Loader A9P00001-UP
(MACHINE) POWERED BY C27 Engine
Disassembly and Assembly 990K Wheel Loader and
844K Wheel Dozer Machine Systems Media Number
-UENR6576-05 Publication Date -01/01/2018
Date Updated -26/01/2018
i01281269
Gear Pump (Secondary Steering) - Assemble SMCS -
4324-016-GT 5073-016-SST Assembly
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1P-0510 Driver Gp 1

• Note Thoroughly clean all parts of the secondary
  steering pump prior to assembly.
• Check the condition of all seals. If any seals
  are worn or damaged, use new parts for
  replacement . Lubricate the seals with clean
  hydraulic oil.
• Apply clean hydraulic oil on all internal parts
  of the secondary steering pump.
• NOTICE
• Failure to follow the recommended procedure or
  the specified tooling that is required for the
  procedure could result in damage to components.
• To avoid component damage, follow the recommended
  procedure using the recommended tools.

Note Two isolation plates are required for the
bottom of the pump housing. Two isolation plates
are required for the top of the pump housing. The
isolation plates hold the seal components
together. The isolation plates that have round
edges on one outer radius will be
31
https//www.aservicemanualpdf.com/ My Dear
Friend! Thank you very much for visiting. Full
manual if required, please enter the following
URL into your browser. https//www.aservicemanual
pdf.com/