Disassembly
Assembly
1.
Plug all ports and clean outside of valve thoroughly.
1. Thoroughlycleananddryallparts.Applyalightcoat-
ing of clean hydraulic oil to parts prior to assembly.
2.
Remove caps (9). Donot remove retaining rings (12)
from spools unless spring (19) is broken.
NOTE: All O--rings, back--up washers, wiper seals and
nylon poppets should be replaced as new items.
NOTE: Spools and spool bores are matched sets. Be
sure each spool is identified with the correct body spool
bore.
2. Install new O--rings (11) in proper grooves in spool
bores.
3.
4.
5.
Remove spools (35) from body (36).
Remove bushings (8) and O--rings (11) from spools.
Remove plugs (6).
3. Install relief valve components (13, 14, 15, 31, and
10)
with new O--ring (34) on plug assembly (32).
4.
Install plugs (6) with new back--up washers (20) and
O--rings (7).
IMPORTANT: Check location and positioning of
plungers when removing from body to assure prop-
er assembly.
5.
Install plungers (33 and 28).
IMPORTANT: Check location and positioning of
plungers during installation.
6.
(4)
Remove plugs (29), springs (30), poppets (1), seats
and plungers (28 and 33).
6. Install new O--rings (5) on seats (4). Install new
back--up washers (26) and O--rings (25) on plugs (29).
7.
Remove plug (17).
7.
Install seats (4), new poppets (1), and plugs (29).
8.
Remove plug (23), disc (27), spring (21) and detent
plunger (22).
8. Install plug (17) with new O--ring (18).
9.
and 15), spring (31) and poppet (10).
Remove relief plug assembly (32), washers (13, 14,
9. Install detent plunger (22), spring (21), disc (27), and
plug (23) with new O--ring (24).
10.Remove
and seats.
allO--ringsandback--upringsfromallplugs
10.If retaining ring (12) has been removed to replace
spool spring (19), install washer (16), spring (19),
spacer (2), and secure with retaining ring (12).
Inspection
11.
(11)
spoolsincleanhydraulicoilandinstallspoolassemblies
into proper location of body.
Slide bushings (8) over spools. Slide new O--rings
over spools and position next to bushings. Dip
1.
for excessive wear.
Remove all nicks and burns from parts and inspect
2.
Inspect all plungers and poppet seats for burrs or
roughness.
12.Install
(27
spool caps (9) and tighten from 20 to 25 ft--lb
to 33 N--m).
new wiper seals (3).
3.
Inspect spool springs (19), relief valve spring (31),
lockout springs (30), and detent spring (21) for break-
age.
13.Install
4.
If spools (35) have excessive wear, the control valve
becomes non--serviceable as the spools and spool
bores are matched. Damaged spools cannot be re-
placed.
5.
Inspectreliefvalvepoppet(10) forbreakage orwear.
Groundsmaster 4000--D
Page 4 -- 93
Hydraulic System (Rev. B)
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Groundsmaster 4000 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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