Toro 03116SL Rev E Service Manual Groundsmaster 4100 D Preface Publication

Disassembly (Fig. 46)
Position the pump into a protected jaw vise, clamp-
ing onto  the outer portion  of the flange,  with the cap
screws up. Mark  the relationship of the working  ports
(for reassembly identification) to  the servo control as-
sembly with a scribe. Remove the four cap screws (15)
retaining backplate (20).
12.Remove the two cap screws (42) that secure cradle
sub--assemblyinside housing. Movethe cradle sub--as-
sembly back--and--forth to release dowel bushings (40)
and remove cradle sub--assembly from housing.
1.
13.Remove  button  head cap  screw  (43)  to  remove
bushing (44) from cradle.
14.Remove
remaining plugs from housing.
2.
housing (19). Remove valve plate (18) from backplate
(20)
(19).
Lift backplate (20) straight up off drive shaft (21) and
15.Discard
o--rings from  all assemblies. Replace  with new seals
upon reassembly.
the shaft seal (25), gaskets (32, 33, 34), and
or from  rotating kit assembly  (6), still in  housing
Inspection
3.
From backplate (20), remove bypass valve (14), for-
ward relief  valve  (26), and  reverse relief  valve  (16).
Note: Mark the valves in relationship to the cavity it was
removed, for reassembly purposes.
1.
Inspect backplate assembly:
A.  Check the bearing  (45) (press fit)  in backplate
(20).
ting is at the dimension shown in Figure 47, bearing
removal is not required.
If needles remain in cage, move freely, and set-
4.
backplate (20).
Remove housing gasket (32)  from housing (19) or
5.
With pump still in vise, remove the six socket head
B.  Check roll pin (38) in backplate (20). If tight and
settothedimension  shown inFigure 47,removal not
required.
screws (17) retaining the servo control assembly (28).
Remove the control assembly and control housing gas-
ket (34) from the housing. Remove  orifice plates (30),
noting location for reassembly.  Remove nut (22), lock
washer (23), and control arm (27) from servo control in-
put shaft. Note position of control arm for reassembly.
Numbered end
6.
To remove rotating  kit assembly (6)  from housing,
first remove pump from vise holding the rotating kit as-
sembly in position. Lower  pump so that the shaft  end
(flange end) isup.Setthe rearofhousing  onto tablewith
housing flat and rotating kit assembly at  rest on table.
(Hole in table, for protruding shaft, is required.) Lift and
remove the housing (19) and drive shaft (21) from rotat-
ing kit assembly (6) and camplate assembly(11).
.090
(2.29
inch
mm)
.173 inch
(4.39 mm)
Figure 47
2.
(19).
at the dimension shown in Figure 48, bearing removal
is not required.
Check the bearing (39) (press fit) in pump  housing
If needles remain in cage, move freely, and setting
7.
and servo piston follower (8) from camplate (11).
Remove camplate (11)from rotating kit assembly (6)
8.
Remove the four socket head screws (5) and wash-
ers (31) retaining each cover plate (9 & 10).
Flange end of housing
Numbered end
9.
(4).
Remove jam nut (1), washer (29), and seal washer
Hold the servo piston bolt with hex key and unscrew
cover plate (10) from bolt.
10.Remove
servopistonassembly  (7)andsealsub--as-
.070
inch
semblies (two sets) (37) from housing. Note: Disassem-
bly of servo piston assembly is not required.
(1.78 mm)
11.
Remove retaining  ring (2)  from the  front of pump
housing (19). Press the drive shaft (21), shaft seal (25),
and washer (24) from housing.  Remove retaining ring
(3),
thrust race (12), thrust bearing (13), second thrust
race (12), and second retaining ring (3) from drive shaft
(21).
Figure 48
Groundsmaster 4100--D
Page 4 -- 61
Hydraulic System
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 258 pages
Document TypeCatalog
LanguageEnglish
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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