Concrete Mixer 6990042 enUS SM
Concrete Mixer 6990042 enUS SM
Concrete Mixer
1 of 100
2 of 100
Dealer Copy -- Not for Resale
MAINTENANCE SAFETY
Instructions are necessary before operating or servicing machine. Read and
understand the Operation & Maintenance Manual, Operator’s Handbook and
WARNING
WARNING signs (decals) on machine. Follow warnings and instructions in the manuals
when making repairs, adjustments or servicing. Check for correct function after
adjustments, repairs or service. Untrained operators and failure to follow
instructions can cause injury or death. W-2003-0807
Safety Alert Symbol: This symbol with a warning statement, means: “Warning, be alert! Your safety is
involved!” Carefully read the message that follows.
CORRECT
MSW30-0409
MAINFRAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-01
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPEC-01
Figure 1
HYDRAULIC
SYSTEM
B-16315
P102693
The delivery report [Figure 2] must be completed by the
dealer and signed by the owner or operator when the
Always use the serial number of the concrete mixer when Bobcat concrete mixer is delivered. An explanation of the
requesting service information or when ordering parts. form must be given to the owner.
ENGINE
SERVICE
HVAC
SPECIFICATIONS
SPECIFICATIONS
REMOVABLE HOSE
GUIDE VIEWING
WINDOWS
HYDRAULIC HOSES
MIXING DRUM
MOUNTING FRAME
P102702
Standard Items
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10-1
Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10-1
Chart
If the attachment is not working correctly, check the hydraulic system of the machine thoroughly before making any
repairs on the attachment. Attachment problems can be affected by a hydraulic system that is not operating to
specifications. Connect a flow meter to the machine to check the hydraulic pump output, relief valve setting and tube
lines to check flow and pressure. (See the machine’s Service Manual for the correct procedure to connect the flow
meter.)
Use the following troubleshooting chart to locate and correct problems which most often occur with the attachment.
P-41502A
2 2
1 Push down on the Bob-Tach levers until they are fully
engaged in the locked position [Figure 10-20-2] (wedges
fully extended through the attachment mounting frame
P102692
holes).
Inspect the Bob-Tach wedge mount (Item 1), mounting The levers and wedges must move freely [Figure 10-20-
flange (Item 2) [Figure 10-20-1] and all welds on the 2].
concrete mixer mount for wear and damage each time
Bob-Tach
AVOID INJURY OR DEATH The wedges must extend through the holes in the
The Bob-Tach wedges must extend through the holes attachment mounting frame, securely fastening the
in the attachment mounting frame. Levers must be attachment to the Bob-Tach [Figure 10-20-3].
fully down and locked. Failure to secure wedges can
allow attachment to come off. NOTE: If the wedge does not contact the lower edge
W-2715-0208
of the hole, the attachment will be loose and
can come off the Bob-Tach.
Bob-Tach (Cont’d)
Power Bob-Tach
WARNING
AVOID INJURY OR DEATH
The Bob-Tach wedges must extend through the holes
in the attachment mounting frame. Levers must be
fully down and locked. Failure to secure wedges can P-41500A
allow attachment to come off.
W-2715-0208
Push (Item 1) [Figure 10-20-4] or [Figure 10-20-5] and
hold the BOB-TACH “WEDGES DOWN” switch until the
Figure 10-20-4
levers are fully engaged in the locked position [Figure
Loader Switch 10-20-6] (wedges fully extended through the attachment
mounting frame holes).
Figure 10-20-7
Figure 10-20-8
P102695
WARNING
AVOID INJURY OR DEATH
Never operate with covers or guards removed.
W-2121-0788
IMPORTANT
Fluid such as engine oil, hydraulic fluid, coolants,
grease, etc. must be disposed of in an
environmentally safe manner. Some regulations
require that certain spills and leaks on the ground
1
must be cleaned in a specific manner. See local, state
and federal regulations for the correct disposal. P102730
I-2067-0499
Figure 10-30-3
Lubricate the following grease fitting. EVERY 50
HOURS:
1
P102731
Clean and inspect the drive chain after the first five hours
of operation, then every 50 hours of operation.
WARNING
AVOID SERIOUS INJURY OR DEATH
Before loading, cleaning or inspecting mixed
material in the drum, stop the concrete mixer drum
and stop the machine engine. P102695
W-2331-0311
WARNING
AVOID INJURY OR DEATH
Figure 10-40-1
1
1
P102728
Remove the two bolts (Item 1) and nuts from the access
cover (Item 2) [Figure 10-40-1].
Figure 10-40-3
1 2
2 2
1
P102728
1
Close the cover (Item 1), reinstall bolts (Item 2) [Figure
P102732 10-40-5] and nuts. Tighten the bolts.
Figure 10-40-4
P102695
• Lubricate the attachment. • Install and operate attachment, check for correct
function.
• Inspect the Bob-Tach wedge mounts, mounting flange
and all welds on the attachment for wear and damage. • Check for leaks. Repair as needed.
Removal
IMPORTANT
When repairing hydrostatic and hydraulic systems,
clean the work area before disassembly and keep all
parts clean. Always use caps and plugs on hoses, P102709
tubelines and ports to keep dirt out. Dirt can quickly
damage the system.
I-2003-0888 Loosen the two set screws (Item 1) [Figure 20-10-3].
Figure 20-10-4
1
P102733 1
2
4
Mark and remove the hydraulic hoses (Item 1) [Figure P102786
20-10-1].
Remove the key (Item 1) [Figure 20-10-4] from the
Install caps / plugs on fittings and hoses.
hydraulic motor shaft.
Figure 20-10-2
Remove the two bolts (Item 2), [Figure 20-10-4] and lock
nuts.
P102734
Parts Identification
1. Seal
2. Bolt
3. Mounting Flange
4. Seal
5. Seal
6. Bearing Race
7. Thrust Bearing
8. Key
9. Shaft
10. Seal
11. Plug 19
17 18
12. Housing
13. Seal 13
16
14. Drive 15 13
15. Spacer
16. Gerotor
17. End Cap 12 13
18. Seal
19. Bolt 10 11
20
20. Spacer 8
1
9
2
P102784
Figure 20-10-5
B-10290
1 Figure 20-10-8
P-12625
1
Figure 20-10-6
1 B-10555
P-12626
IMPORTANT
When repairing hydrostatic and hydraulic systems,
clean the work area before disassembly and keep all
parts clean. Always use caps and plugs on hoses,
tubelines and ports to keep dirt out. Dirt can quickly
damage the system.
I-2003-0888
Disassembly (Cont'd)
Figure 20-10-9
B-10294
Figure 20-10-10
Disassembly (Cont'd)
Figure 20-10-13
B-10298
B-10297
Disassembly (Cont'd)
Figure 20-10-17
B-10302
Inspection
Remove the bearing race and O-ring [Figure 20-10-17].
Clean all parts in solvent and use air pressure to dry
Figure 20-10-18 them. Do not use cloth or paper because small pieces of
Dust Seal
Flange Seal Removal Tool
Outer Side
Assembly
Figure 20-10-20
B-10300
Figure 20-10-23
B-10302
Figure 20-10-21
B-10301
B-10333
Use the correct size driver tool. Install the pressure seal
and dust seal [Figure 20-10-21] into the mounting
flange.
Assembly (Cont'd)
Figure 20-10-24
B-10296
B-10295
B-10297
Assembly (Cont'd)
Figure 20-10-28
B-10292
Figure 20-10-29
Assembly (Cont'd)
Figure 20-10-32
P-12626
Tighten the bolts to 2,8 N•m (25 in-lb) torque. Check that
all seals are in position, then tighten the bolts to 23 N•m 1
1
P-12625
Install the valve onto the motor. Install the four bolts (Item
1) [Figure 20-10-34] into the hydraulic valve and tighten
bolts.
Assembly (Cont'd)
Figure 20-10-35
Gerotor
Star Point
Align With
Drive
Timing Dot
Timing Dot
(Mark Any Drive Tooth)
Align With Shaft
Timing Dot Prior to
Spacer Installing Wear Plate
Plate
Timing
Dot - Shaft
C-3384
1. Gerotor.
2. Splined Drive.
3. Output Shaft.
Installation
2
Figure 20-10-36 1
3
2
3
P102783
4
3 Using a straight edge (Item 1), align the gear (Item 2) on
1
P102786 the mixing drum with the gear on the hydraulic motor
(Item 3) [Figure 20-10-38]. Failure to align the gears
could cause premature gear and chain failure.
Install the plate (Item 1) and hydraulic motor (Item 2)
[Figure 20-10-36]. When the gears are aligned, tighten the two set screws
(Item 2) [Figure 20-10-37].
Install the two bolts (Item 3), [Figure 20-10-36] and lock
Figure 20-10-37
1
1
1
2
P102734
P102709
P102709
Installation (Cont’d)
Figure 20-10-40
P102733
Removal
IMPORTANT
When repairing hydrostatic and hydraulic systems,
clean the work area before disassembly and keep all
parts clean. Always use caps and plugs on hoses,
tubelines and ports to keep dirt out. Dirt can quickly
damage the system.
I-2003-0888
Figure 20-20-1
Figure 20-20-2
P-12626
Parts Identification
1. Nut
2. Coil
3. Spool
4. Body
5. Relief Valve
6. Bolt
7. Plug
8. O-ring
6 5
7
7
8 2
8
1
P102785
Disassembly
1 1
IMPORTANT
When repairing hydrostatic and hydraulic systems,
clean the work area before disassembly and keep all
parts clean. Always use caps and plugs on hoses,
tubelines and ports to keep dirt out. Dirt can quickly
damage the system.
I-2003-0888 2 P-12635
Figure 20-20-3
Remove the O-rings (Item 1) and back-up rings (Item 2)
[Figure 20-20-5] from the spool.
1
Figure 20-20-6
2
P-12627
Remove the coil nut (Item 1) and coil (Item 2) [Figure 20-
20-3]. P-12629
Figure 20-20-4
Remove the plug (Item 1) [Figure 20-20-6].
P-12628
Disassembly (Cont'd)
Figure 20-20-7 1 1
2
P-12633
Figure 20-20-10
Remove the O-ring (Item 1) [Figure 20-20-7].
Figure 20-20-8
P-12631
Figure 20-20-11
Remove the relief valve (Item 1) [Figure 20-20-8].
P-12632
Assembly
Figure 20-20-12
2
P-12633
P-12630
1
Assembly (Cont'd)
Figure 20-20-16 1
1
2 P-12635
Figure 20-20-19
Apply oil to and install the O-ring (Item 1) [Figure 20-20-
16] on the plug.
1
Figure 20-20-17
P-12628
Assembly (Cont'd)
Figure 20-20-20
P-12627
Installation
Figure 20-20-21
P-12626
Figure 20-20-22
1
2
P-12625
BEARING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-10-1
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-10-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-10-3
DRUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-40-1
Removal And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-40-1
Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-40-4
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-40-5
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-40-6
Removal
2
Remove the shaft mount. (See SHAFT MOUNT on Page
30-60-1.)
1
WARNING
AVOID INJURY OR DEATH
Wear safety glasses to prevent eye injury when any
P102737
of the following conditions exist:
• When fluids are under pressure.
• Flying debris or loose material is present. Remove the cotter pin (Item 1) and nut (Item 2) [Figure
• Engine is running. 30-10-2].
• Tools are being used.
W-2019-0907
Figure 30-10-3
P102738
P102705
Removal (Cont'd)
Figure 30-10-4
P102880
Figure 30-10-5
1
P102890
Installation
Figure 30-10-8 1
2
P102879
Figure 30-10-11
Install the bearing cup (Item 1) [Figure 30-10-8] on both
ends of the inner drum.
P102778
Installation (Cont'd)
Figure 30-10-12
P102739
Figure 30-10-13
Figure 30-10-15
P102738
P102737
Install the washer (Item 1) [Figure 30-10-13].
Installation (Cont'd)
Figure 30-10-16
P102705
WARNING
AVOID INJURY OR DEATH
Wear safety glasses to prevent eye injury when any
of the following conditions exist:
P102711
• When fluids are under pressure.
• Flying debris or loose material is present.
• Engine is running. Remove the roller (Item 1) [Figure 30-20-2].
• Tools are being used.
W-2019-0907
Installation: Install the roller.
Figure 30-20-3
P102702
1
1
4 P102698
Figure 30-20-4
P12684
P12685
P12683
Remove the sleeve (Item 1) [Figure 30-20-7] from the
roller.
Remove the bearing retainer (Item 1) [Figure 30-20-5]
from both sides of the roller. Installation: Install the sleeve into the roller.
Figure 30-30-1
P102778
Figure 30-40-1
1
P102770
WARNING
AVOID INJURY OR DEATH
Wear safety glasses to prevent eye injury when any
of the following conditions exist:
• When fluids are under pressure.
• Flying debris or loose material is present.
• Engine is running.
• Tools are being used.
W-2019-0907
P102738
1 1
1
P102986
P102737
Install chains (Item 1) to the mixing blades [Figure 30-
40-6].
Remove the cotter pin (Item 1) and nut (Item 2) [Figure
30-40-4].
Figure 30-40-7
P102771
Parts Identification
1. Dust Cap
2. Cotter Pin
3. Castle Nut
4. Washer
5. Bearing
6. Cup
7. Drum
8. Shaft
9. Seal
1
3
P102768
Disassembly
WARNING
AVOID INJURY OR DEATH
Wear safety glasses to prevent eye injury when any P102773
of the following conditions exist:
• When fluids are under pressure.
• Flying debris or loose material is present. Remove the bearing (Item 1) [Figure 30-40-9].
• Engine is running.
• Tools are being used. Figure 30-40-10
W-2019-0907
Figure 30-40-8
P102774
Assembly
Figure 30-40-11
1
1
P102772
Apply grease to the seal lip and install the seal (Item 1)
[Figure 30-40-13].
Figure 30-40-12
1
P102771
Removal
WARNING
AVOID INJURY OR DEATH
Wear safety glasses to prevent eye injury when any
of the following conditions exist:
• When fluids are under pressure. 2
• Flying debris or loose material is present. P102787
• Engine is running.
• Tools are being used.
W-2019-0907 Loosen the two lock nuts (Item 1) [Figure 30-50-3] and
bolts on the hydraulic motor mount (Item 2).
Figure 30-50-1
Figure 30-50-4
P102708
P102728
P102695
Installation
Figure 30-50-5
2
2 1
1
P102708
Figure 30-50-8
P102783
6,35 mm
(0.250 in)
Using a straight edge (Item 1), align the gear (Item 2)
Figure 30-50-6
2 2 P102695
Installation (Cont’d)
Figure 30-50-9
2
2
1
P102728
WARNING
1
AVOID INJURY OR DEATH
Wear safety glasses to prevent eye injury when any
of the following conditions exist: P102776
Figure 30-60-3
Figure 30-60-1
P102713
P102710
1 1
P102714
1 1
1
P102713 P102777
Figure 30-70-1
P102778
Removal
Figure 40-10-1
2 2 1
3 2
P102782
2
2
P102699
Figure 40-10-2
1 P102780
1
1
2 2
P102779
Removal (Cont’d)
Figure 40-10-5
P102699
Figure 40-10-6
1 3
1
P102781
Installation
2
Figure 40-10-7
3
1
3
1 P102780
3
1
2 P102779
3
3
Place the collar (Item 1) onto the engine stop switch (Item
P102781 2) [Figure 40-10-9]. Rotate the collar clockwise to install
the collar onto the engine stop switch.
Install the attachment control display (Item 1) onto the Tighten the two adjustment screws (Item 3) [Figure 40-
panel (Item 2) [Figure 40-10-7]. 10-9] to prevent the switch from turning.
Figure 40-10-8
1
1
P102782
P102699
P102987 Install the key switch (Item 1) through the back panel.
Install nut (Item 2) [Figure 40-10-10] and tighten.
Installation (Cont’d)
Figure 40-10-11
1
2
1 1
P102700
Figure 40-10-12
2
2
3
P102701
Dimensions
• All dimensions are shown in millimeters. Respective imperial dimensions are given in inches enclosed by parentheses.
• Where applicable, specifications conform to SAE and ISO standards and are subject to change without notice.
NA7008
Performance
Hydraulic System
Capacities
A B
MALE FEMALE
COUPLER COUPLER
TS-01697
NA7026
The following table shows standard torque specifications for bolts with zinc phosphate coating. Bolts purchased from
Bobcat Company that have zinc phosphate coating are specified by the letter H following the part number.
Thread
SAE Grade 5 SAE Grade 8
Size
N•m 0.250 9,0 - 10,2 12,4 - 13,6
(in-lb) (80 - 90) (110 - 120)
0.3125 20,3 - 22,6 24,2 - 27,1
(180 - 200) (215 - 240)
N•m 0.375 34 - 38 47 - 54
(ft-lb) (25 - 28) (35 - 40)
0.4375 54 - 61 81 - 88
(40 - 45) (60 - 65)
0.500 88 - 95 122 - 136
(65 - 70) (90 - 100)
0.5625 122 - 136 170 - 190
(90 - 100) (125 - 140)
IMPORTANT
Nut Nut
When repairing hydrostatic and hydraulic systems,
clean the work area before disassembly and keep all Washer
parts clean. Always use caps and plugs on hoses, Washer
tubelines and ports to keep dirt out. Dirt can quickly O-ring
damage the system.
I-2003-0888 O-ring
Figure SPEC-50-1
A-1852
When the fitting is tightened, you can feel when the fitting Always use two wrenches when loosening and tightening
is tight to eliminate leakage caused by under or over hose or tubeline fittings.
torqued fittings. Use petroleum jelly to hold the O-ring in
position until the fittings are assembled [Figure SPEC-
50-1].
Figure SPEC-50-3
1
Nut Seals
To Fitting
Nut Seals
2 To Port
P-79498
Use the chart (below) to find the correct tightness needed The hex portion of the nut does not contact the surface of
(Item 2) [Figure SPEC-50-3]. If the fitting leaks after the component when the nut is tight.
tightening, disconnect it and inspect the seat area for
damage. Port Seal and O-ring Boss
Tightening Torque
Flare Fitting Tightening Torque x TORQUE
Tubeline x TORQUE x N•m
Outside x N•m Thread Size (ft-lb)
Diameter Thread Size (ft-lb) 7/16” - 20 18 (13)
1/4” 7/16” - 20 18 (13) 9/16” - 18 30 (22)
5/16” 1/2” - 20 23 (17) 3/4” -1 6 54 (40)
3/8” 9/16” - 18 30 (22) 7/8” - 14 81 (60)
1/2” 3/4” - 16 54 (40) 1-1/16” - 12 114 (84)
5/8” 7/8” - 14 81 (60) 1-3/16” - 12 133 (98)
3/4” 1-1/16” - 12 114 (84) 1-5/16” - 12 160 (118)
7/8” 1-3/16” - 12 133 (98) 1-7/16” - 12 209 (154)
1” 1-5/16” - 12 160 (118) 1-5/8” - 12 221 (163)
1-1/4” 1-5/8” - 12 209 (154)
1-1/2” 1-7/8” - 12 221 (163)
2” 2-1/2” - 12 342 (252)
Tighten the nut with a wrench no more than one hex flat
maximum.