Toro DT35 Series Installation and maintenance instructions

Introduction ____________________________________________________________________
The DT35 and DT55 series full-circle/adjustable part-circle rotary sprinklers are
designed specifically for golf course applications.
Manufactured from durable, high-strength engineering plastic and stainless-steel
components, these sprinklers incorporate many innovative and time-proven
features for lasting, maintenance-free operation.
Prior to installing the sprinkler, read through the recommended installation and
start-up procedures. Please observe all WARNINGS and CAUTIONS when
installing and operating this equipment.
Features ________________________________________________________________________
DT35 and DT55 Series Rotary Sprinklers
Installation & Service Instructions
O F F
A U T O
O N
DT35 Electric VIH DT55 Electric VIH
■Full-circle (360°) with uni-directional clockwise rotation and
adjustable part-circle (40°–330°) configuration
■Arc adjustment from riser band in 5° increments
■Trajectory main nozzle - Selectable 15° or 25°
■Full 4" (10.2 cm ) pop-up clears tall grasses
■Color-coded nozzles by radius and gallonage
■Cap serves as an effluent water indicator
■Variable stator ensures 3-minute rotation
■Selectable pressure regulation settings of 50 psi (3.4 bar),
65 psi, 80 psi or 100 psi to ensure consistently accurate
nozzle performance regardless of elevation (Electric only)
■Three valve activation types available: Electric Valve-In-Head,
Normally Open Hydraulic Valve-In-Head, and Check-O-Matic
DT35 Series
■Radius: 43'–88' (13,1 m–26,8 m) @ 25° trajectory
■Flow Rate: 15–50 GPM (56,8–189,3 LPM)
■Trajectory: Selectable 15° or 25°
■Arc: full circle (360°) or adjustable part circle (40°–330°)
■Recommended operating pressure: 65–100 psi (4,5–6,9 bar)
■Minimum pressure: 40 psi (2,8 bar)
■Maximum pressure: 150 psi (10,3 bar)
■Precipitation rate:
■Minimum: 0.46"/hr (1,17 cm/hr)
■Maximum: 0.63"/hr (1,60 cm/hr)
■Inlet Size: 1" (25 mm) NPT, BSP or ACME
■Electric Valve-in-head Solenoid:
■Inrush current: 0.30A @ 24 VAC, 50/60 Hz
■Holding current: 0.20A @ 24 VAC, 50/60 Hz
■Check-O-Matic model checks up to 37' (11,27 m) of elevation
■Three valve activation types available: Electric Valve-In-Head,
Normally Open Hydraulic Valve-In-Head, and Check-O-Matic
■Three body thread types available: NPT, BSP and ACME
■Manual sprinkler operation control: On-Off-Auto (Electric only)
■All internal components serviceable from the top of the
sprinkler
■Large selection of color-coded nozzles available
■Durable plastic and stainless-steel construction
■Constant velocity drive
■Optional back nozzles available
■Color-coordinated nozzles
■Optional radius reduction screw
DT55 Series
■Radius: 52'–95' (15,8–28,9 m) @ 25° trajectory
■Flow rate: 15–62 GPM (56,8–234,7 LPM)
■Trajectory: Selectable 15° or 25°
■Arc: full circle (360°) or adjustable part circle (40°–330°)
■Recommended operating pressure: 65–100 psi (4,5–6,9 bar)
■Minimum pressure: 40 psi (2,8 bar)
■Maximum pressure: 150 psi (10,3 bar)
■Precipitation rate:
■Minimum: 0.50"/hr (1,27 cm/hr)
■Maximum: 0.72"/hr (1,83 cm/hr)
■Inlet Size: 1.5" (38 mm) NPT, BSP or ACME
■Electric Valve-in-head Solenoid:
■Inrush current: 0.30A @ 24 VAC, 50/60 Hz
■Holding current: 0.20A @ 24 VAC, 50/60 Hz
■Check-O-Matic model checks up to 37' (11,27 m) of elevation
Note: For preliminary use only.
Specifications and Performance/Application Data ________________________________________

2
DT35/DT55 SR Series Nozzle Performance Chart—U.S.
Base Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set
Pressure
Main - Plug Main - Plug Main - Plug Main - Plug Main - Plug
▲ BLUE ■GRAY ▲ ORNG ■GRAY ▲ RED ■GRAY ▲ GRAY ■GRAY ● GRAY ■GRAY
psi Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM
65 46' 8.7 46' 10.4 50' 12.4 42' 10.2 47' 13.9
SOR 5:02 minutes 4:16 minutes 3:36 minutes 4:19 minutes 4:06 minutes
80 46' 9.6 47' 11.5 53' 13.7 44' 11.2 51' 15.3
SOR 4:22 minutes 3:40 minutes 3:03 minutes 3:53 minutes 3:40 minutes
▲ = Intermediate Nozzle ■ = Inner Nozzle ● = Main Nozzle w/o Restrictor
SR = Short Range SOR = Speed of Rotation
DT35 & DT55 Back Nozzle Performance Chart—U.S.
Nozzles 65 PSI 80 PSI
Part# Restrictor Color Radius GPM Radius GPM Profile
89-4785 NO Green 25 1.7 25 1.9
102-2135 102-1124 (Large White Included) White 25 4.1 26 4.5
102-2136 102-2041 (Yellow Included) Yellow 24 3.8 25 4.1
89-3942 89-4649 (Black Required) Blue 23 2.4 24 2.4
89-4652 89-4650 (Small White Required) Brown 30 3.1 30 3.5
89-3942 NO Blue 36 3.4 36 3.7
89-4738 NO Red 29 3.5 31 3.8
89-4651 NO Yellow 34 2.6 36 2.9
89-4652 NO Brown 34 3.8 34 4.4
89-3729 NO Ornge 33 4.0 34 4.5
89-4653 NO Green 32 4.1 32 4.8
89-1879 NO Gray 35 4.8 36 5.0
89-4654 NO Black 32 4.7 32 5.1
89-1878 NO Red 36 4.7 36 5.2
102-2925 NO Blue 40 2.9 40 3.1
102-2926 NO Orange 43 4.2 43 4.4
102-2927 NO Gray 46 4.6 47 4.9
102-2928 NO Red 50 5.7 52 6.3
102-2929 NO Beige 48 7.2 53 8.1
Specifications and Performance/Application Data _____________________________________
DT55 Series Sprinkler Performance Data
DT35 Series Sprinkler Performance Data
Base Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set
Pressure
30 ● (Plug) 31 ●(Yellow) 32 ●(Blue) 33 ●(Brown) 34 ●(Orange) 35 ●(Green) 36 ●(Gray) 37 ●(Black)
▲BIEGE ★YELLOW ▲PLUG ✪GREEN ▲YELLOW ★YELLOW ▲YELLOW ★YELLOW ▲YELLOW ★YELLOW ▲GREEN ★YELLOW ▲GREEN ✪GREEN ▲GREEN ✪GREEN
psi Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM
50 43 8.2 53 13.2 58 16.6 63 22.3 65 26.4
65 45 10.0 55 15.0 60 21.0 65 25.0 70 29.0 74 36.0
80 46 11.5 58 16.5 64 22.1 69 27.4 73 32.2 77 39.4 80 44.0 85 47.0
100 47 13.4 60 18.4 69 24.7 73 30.3 76 36.0 80 43.5 83 49.0 88 51.5
Base Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set
Pressure
51 ●(Yellow) 52 ●(Blue) 53 ●(Brown) 54 ●(Orng) 55 ●(Green) 56 ●(Gray) 57 ●(Black) 58 ●(Red) 59 ●(Beige)
▲ PLUG ✪GREEN ▲ YLW ★YELLOW ▲ YLW ★YELLOW ▲ YLW ★YELLOW ▲ GREEN ★YELLOW ▲ GREEN ✪GREEN ▲ GREEN ✪GREEN ▲ BLUE ✪GREEN ▲ BLUE ✪GREEN
psi Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM
50 53 13.2 58 16.6 63 22.3 65 26.4
65 55 15.0 60 21.0 65 25.0 70 29.0 74 36.0
80 58 16.5 64 22.1 69 27.4 73 32.2 77 39.4 80 44.0 85 47.0 90 50.0 92 57.5
100 60 18.4 69 24.7 73 30.3 76 36.0 80 43.5 83 49.0 88 51.5 93 54.5 95 62.0
Radius shown in feet.
Toro recommends the use of a 1 1 ⁄ 4 " (30mm) swing joint at flows over 25 GPM (95 LPM). Sprinkler radius of throw per ASAE standard S398.1
● = Main Nozzle ▲ = Intermediate Nozzle ★ = Inner Nozzle (Yellow w/ White Restrictor) ✪ = Inner Nozzle (Green w/ White Restrictor)
All sprinklers are equipped with the selectable pilot valve that allows settings at 50, 65, 80 and 100 psi.

3
Precipitation Rate Formulas
❚Square-spaced sprinklers in pattern:
GPM of full circle x 96.3
(Spacing)2
❚Triangular-spaced sprinklers in pattern:
GPM of full circle x 96.3
(Spacing)2(0.866)
❚Area and flow:
Total GPM of zone x 96.3
Total irrigated
square feet of zone
❚Single row:
GPM of full circle x 96.3
(Spacing) (Scallop)
Sprinkler Spacing Guidelines
❚Square Spacing
No wind - 55% of diameter
4 mph wind - 50% of diameter
8 mph wind - 45% of diameter
❚Triangular Spacing
No wind - 60% of diameter
4 mph wind - 55% of diameter
8 mph wind - 50% of diameter
❚Single-Row Spacing
No wind - 50% of diameter
4 mph wind - 50% of diameter
8 mph wind - 45% of diameter
Note: Designing for zero (0) mph
wind conditions is not
recommended. Design for worst
wind conditions.
For additional information, refer to
Toro Technical Data Manual,
form number 490-1737.
Nozzle / PSI / GPM #31 Nozzle @ 65 PSI, 15.0 GPM #32 Nozzle @ 65 PSI, 21.0 GPM #33 Nozzle @ 65 PSI, 25.0 GPM
Trajectory 15˚ 25˚ 15˚ 25˚ 15˚ 25˚
A(Radius) 50' 55' 51' 60' 59' 65'
B (Spray Height) 5' 11' 6' 12' 7' 13'
C (Distance from Head) 26' 33' 28' 34' 32' 35'
Nozzle / PSI / GPM #34 Nozzle @ 65 PSI, 29.0 GPM #35 Nozzle @ 65 PSI, 36.0 GPM #36 Nozzle @ 80 PSI, 44.0 GPM
Trajectory 15˚ 25˚ 15˚ 25˚ 15˚ 25˚
A(Radius) 63' 70' 64' 74' 73' 80'
B (Spray Height) 6' 14' 7' 15' 8' 17'
C (Distance from Head) 35' 39' 36' 43' 40' 45'
Nozzle / PSI / GPM #37 Nozzle @ 80 PSI, 47.0 GPM
Trajectory 15˚ 25˚
A(Radius) 72' 85'
B (Spray Height) 8' 18' '
C (Distance from Head) 39' 46'
A
B
C
DT35 Series Trajectory Performance Chart—U.S.
Nozzle/PSI/GPM #51 Nozzle @ 65 PSI, 15.0 GPM #52 Nozzle @ 65 PSI, 21.0 GPM #53 Nozzle @ 65 PSI, 25.0 GPM
Trajectory 15˚ 25˚ 15˚ 25˚ 15˚ 25˚
A(Radius) 51' 55' 51' 60' 59' 65'
B (Spray Height) 6' 13' 6' 11' 7' 13'
C (Distance from Head) 32' 40' 31' 34' 32' 37'
Nozzle/PSI/GPM #54 Nozzle @ 65 PSI, 29.0 GPM #55 Nozzle @ 65 PSI, 36.0 GPM #56 Nozzle @ 80 PSI, 44.0 GPM
Trajectory 15˚ 25˚ 15˚ 25˚ 15˚ 25˚
A(Radius) 63' 70' 66' 74' 75' 80'
B (Spray Height) 8' 15' 9' 15' 8' 18'
C (Distance from Head) 40' 41' 43' 45' 44' 47'
DT55 Series Trajectory Performance Chart—U.S.
Nozzle/PSI/GPM #57 Nozzle @ 80 PSI, 47.0 GPM #58 Nozzle @ 80 PSI, 50.0 GPM #59 Nozzle @ 80 PSI, 57.5 GPM
Trajectory 15˚ 25˚ 15˚ 25˚ 15˚ 25˚
A(Radius) 74' 85' 82' 90' 81' 92'
B (Spray Height) 9' 19' 10' 18' 11' 21'
C (Distance from Head) 41' 45' 43' 45' 49' 49'
A = Radius
B = Spray Height
C = Spray Height
Distance From Head

Installation Procedure ________________________________________
To assure maximum performance from your 800S series sprinklers, read these instructions
completely prior to installation or service.
Constructing Swing Joints
1. Construct or provide triple swing joints for each sprinkler as shown in Figure 1. Use PVC or
ABS pipe nipple for the sprinkler connection.
Note: On sites where the possibility of heavy equipment rolling over a sprinkler exists, the
swing joint will flex preventing damage to the lateral or main lines. On a new installation in raw
ground where the sprinklers are to be initially installed above the finished grade and lowered
when new turf is established, the swing joint allows sprinkler repositioning without changing
risers. This is a common and practical procedure which eliminates the problem of dirt being
accidentally introduced into the lateral lines when a riser is changed.
2. Flush lines thoroughly prior to installing sprinkler.
3. Apply PTFE tape on riser threads (not required on ACME threads). Install sprinkler to the riser and tighten.
CAUTION: Use only PTFE tape on riser threads. Use of pipe dope or other types of sealing compounds can cause
deterioration of sprinkler body threads.
Connecting Control Wires (Electric Models Only)
1. Route control wires to sprinklers. Provide extra wire at sprinkler to allow for height adjustment. One common wire and station wire
is required for each sprinkler. See Wire Sizing Chart, Table 1 for proper application.
Note: Wire length data provided in Table 1 is the sum
of the station and common wire legs. See example in
Figure 2.
2. Attach control wires to solenoid leads using an
approved waterproof splicing method.
CAUTION: All wire splices and field connections
must be waterproofed to prevent short circuit to
ground and subsequent controller damage.
4
AUT O
ON
OF F
Figure 1
Voltage AWG mm2Voltage Drop Circular Mils1 Sprinkler
Total Wire Length BetweenController and Sprinkler
2 Sprinklers3Sprinklers4 Sprinklers
2314/14 2.5/2.5
2.5/4.0
2.5/5.5
4.0/4.0
4.0/5.5
4.0/7.0
5.5/5.5
2.5/2.5
2.5/4.0
2.5/5.5
4.0/4.0
4.0/5.5
4.0/5.5
4 4100 3285' 1001 m
1298m
1770 m
1595 m
2067 m
2812 m
2540 m
1251 m
1622 m
2213m
1993m
2584 m
3515 m
3175 m
500 m
649 m
885 m
797 m
1033 m
1406 m
1270 m
626 m
811 m
1106 m
996 m
1292 m
1757 m
1587 m
334 m
432 m
590 m
531 m
689 m
937 m
846 m
417 m
541 m
738 m
664 m
861 m
1172 m
1058m
250 m
324 m
443m
399 m
517 m
703m
635 m
313m
406 m
553m
498m
646 m
879 m
790 m
1642' 1095' 821'
2314/12 45315 4259' 2129' 1419' 1064'
2314/10 4 7250 5809' 2904' 1936' 1452'
2312/12 465305232' 2616' 1744' 1308'
2312/10 48465 6783' 3391' 2261' 1695'
2312/84 11515 9227' 4613' 3075' 2306'
2310/10 4 10400 8333' 4166' 2778'2083'
24 14/14 5 4100 4106' 2053' 1369' 1026'
24 14/12 5 5315 5323' 2662' 1774' 1331'
24 14/10 5 7250 7261' 3631' 2420' 1815'
24 12/12 56530 6540' 3270' 2180' 1635'
24 12/10 58465 8478' 4239' 2826' 2119'
24 12/85 11515 11533' 5766' 3844' 2883'
24 10/10 10/10 5 10400 10416' 5208' 3472' 2604'
Table 1: Wire Sizing Chart
Figure 2
Station Wire = 1095' (334m)
Common Wire = 1095' (334m)
Total Wire Length = 2190' (668m)

5
Connecting Hydraulic Control Tubing (Hydraulic Models Only)
1. Route control tubing from the controller
to the sprinkler location(s).
Note: Leave an 18" (45.7 cm) service
loop of tubing at each sprinkler to
facilitate movement of sprinkler and
service operations. Refer to Table 2
for tubing run length and sprinkler
elevation information.
2. Flush tubing thoroughly to remove all
air and debris.
3. Remove the tube retainer and poly cap
from the tubing adapter at the base of
the sprinkler.
4. Slide the tube retainer over the end of the control tubing and attach tubing to adapter.
5. Slide tube retainer over the adapter area to secure tubing.
System Start Up _________________________________________________________________
The following is a recommended procedure that will protect system components during system start-up. The procedure is based on a
velocity fill rate of less than 2' (0.61 m) per second. See Table 3 below.
1. Use jockey pump only to fill the system at a velocity fill rate of less than 2' (0.61 m) per second.
CAUTION: Failure to comply with recommended fill rate will increase line pressure resulting in a water hammer effect
that could damage sprinklers and piping components.
2. Use quick coupler keys at all tees and greens with quick coupler valves to bleed air from the system lines during the filling
process. For best results, do not compress air and then relieve it – bleed the air continuously while filling the system.
3. After water has filled all lines and all air is removed, remove the quick coupler keys.
Table 3: Recommended System Fill Rate
Table 2: Hydraulic Control Systems
Maximum Distance
Type of System* From Controller Elevation Restrictions
Normally Open (01) Valve elevation should not exceed
with 3/16" Control Tubing 500' 25' ABOVE controller elevation or
70' BELOW controller elevation.
Normally Open (01) Valve elevation should not exceed
with 1/4" Control Tubing 1000' 25' ABOVE controller elevation or
70' BELOW controller elevation
*• All hydraulic connections on Toro valves are 1⁄4" insert type.
• Control line pressure must be equal to or greater than mainline pressure.
• Control line pressure range is 40 to 150 PSI.
Pipe Size Flow Velocity Pipe Size Flow Velocity
in. cm GPM LPM ft/sec m/sec in. cm GPM LPM ft/sec m/sec
1/2 1.3 2 7.6 1.60 0.49 3 7.6 45 170.3 1.86 0.57
3/4 1.9 3 11.4 1.92 0.59 4 10.1 75 283.9 1.87 0.57
1 2.5 5 18.9 1.50 0.46 6 15.2 150 567.8 1.73 0.53
1-1/4 3.1 10 37.9 1.86 0.57 8 20.2 250 946.3 1.70 0.52
1-1/2 3.8 10 37.9 1.41 0.43 10 25.4 450 1703.0 1.97 0.60
2 5.0 20 75.7 1.80 0.55 12 30.5 500 1893.0 1.55 0.47
2-1/2 6.4 30 113.6 1.84 0.56
WARNING
TO PREVENT POSSIBLE SERIOUS INJURY, DO NOT STAND OR LEAN DIRECTLY OVER ANY SPRINKLER WHEN
FILLING SYSTEM OR WHEN ACTIVATING MANUALLY AT THE SPRINKLER.

Arc Adjustment Procedure ________________________________________________________
The DT35 and DT55 sprinkler models can be operated in full-circle or part circle operation. In part-circle operation, the sprinkler arc
can be adjusted from 40°– 330° (factory preset at 180°). The left side of the arc, located at the end of the counterclockwise rotation, is
non-adjustable (fixed). Therefore, all arc adjustments, whether increasing or decreasing, will change the right side of the arc, located
at the end of the clockwise rotation. When full-circle (360°) operation is selected, the sprinkler will rotate in a clockwise direction only.
1. Insert the multi-purpose tool (P/N 995-83) into the slot provided in the top of the cap. Pull the riser assembly up, then grasp the
assembly to hold it in the popped-up position. See Figure 3.
2. Find the sprinkler left stop by rotating the turret counter clockwise until it stops. The left stop indicates the fixed stop of the arc.
See Figure 4.
3. Find the sprinkler right stop by rotating the turret clockwise until it stops. See Figure 5.
Note: If the sprinkler is set at 360° (full-circle), there will be no stop when turning clockwise.
4. Adjust the arc while the turret is pointing at the right stop. Hold the sprinkler riser firmly while pressing the release on the
adjustment band. Rotate the turret counterclockwise or clockwise to the desired right stop. See Figure 6.
The adjustment band of the DT35 and DT55 have markers at predetermined arcs. By aligning the adjustment band indicators to the
turret arrow, you can set the sprinkler arc to 90°, 180°, 270° or 360°. See Figure 7.
5. Activate the sprinkler to check proper arc setting and readjust as necessary.
6
Figure 3 Figure 4 Figure 5 Figure 6
WARNING
DUE TO THE HIGH OPERATING PRESSURE, NEVER STAND OR LEAN DIRECTLY OVER THE TOP OF THE
SPRINKLER OR COME IN CONTACT WITH THE SPRAY. FAILURE TO COMPLY MAY RESULT IN SERIOUS INJURY.
Figure 7
180° 270°
90°

Nozzle Trajectory Adjustment Procedure _______________________________________
Note: The nozzle trajectory is factory set at 25 degrees.
1. Insert the multi-purpose tool (P/N 995-83) into the slot provided in the top of the cap. Pull the riser assembly up, then grasp the
assembly to hold it in the popped-up position.
2. Remove the cap retaining screw and cap.
3. Using a 5/8" nut driver (P/N 995-99), turn the nozzle/housing assembly left to select 15° trajectory as shown in Figure 8. Turn the
nozzle/housing assembly right to select 25° trajectory as shown in Figure 9.
4. Install the cap making sure the top the nozzle housing is correctly nested in the cap.
5. Install the cap retaining screw.
6 Activate the sprinkler to check the spray trajectory.
7
Figure 8
Figure 9
15o
25o
Turn Nozzle
Clockwise
Turn Nozzle
Clockwise

Pilot Valve Operation (Electric Models Only)
The main function of the pilot valve is to control the operation of the
main valve located in the base of the sprinkler body. The main valve is
operated by the release of water metered through the pilot valve when
it is activated either manually at the sprinkler or by the irrigation system
controller.
Another important function of the pilot valve is to regulate the water
pressure to the sprinkler nozzle. Pressure regulation compensates for
large variations within the system and maintains a constant pressure
for optimum sprinkler operation. The pilot valve is factory set to
regulate one of four pressure levels 50 psi (3.4 bar), 65 psi (4.5 bar),
80 psi (5.5 bar) or 100 PSI (6.9 bar).
Change the pilot valve operating pressure by loosening the thumb
screw that secures the selector lever. Position the selector lever to the
desired operating pressure and hand-tighten the nut. See Figure 10.
Troubleshooting__________________________________________________________________
Pilot Valve
PROBLEM POSSIBLE CAUSE – CORRECTIVE ACTION
Sprinkler will (a) No 24 VAC to solenoid assembly. (Electric Models)
not turn on – Measure voltage with a Digital Volt Meter (DVM). Check wiring and controller program.
– Refer to Controller Operating Instructions.
(b) Selector cam in "OFF" position.
– Set to "AUTO" position.
(c) Debris in pilot valve assembly.
– Disassemble and remove all debris. (See Servicing Pilot Valve page 12.)
(d) Insufficient pressure in controller supply line and/or sprinkler control tube. (N.C. Models)
– Check pressure.
Sprinkler will (a) Constant 24 VAC from controller. (Electric Models)
not shut off – Check for voltage using a DVM. If voltage is present, disconnect wire.
If sprinkler closes, service controller. Refer to Controller Service Manual.
(b) Selector cam in manual "ON" position.
– Set to "AUTO" or "OFF" position.
(c) Debris in pilot valve assembly.
– Disassemble and remove all debris. (See Servicing Pilot Valve page 12.)
(d) Constant pressure from controller. (N.C. Models)
– Check pilot valve at controller for constant flow.
– Check elevation differential. Valve elevation should not exceed 0' above
controller elevation or 70' (21.3 m) below controller elevation.
Sprinkler Mechanism
PROBLEM POSSIBLE CAUSE – CORRECTIVE ACTION
Sprinkler won't rotate (a) Debris wedged between stator and turbine.
– Remove obstruction.
(b) Drive assembly defective.
– Replace drive assembly.
(c) Nozzle base assembly defective.
– Replace nozzle base assembly.
Head sticks up (a) Dirt in riser assembly.
– Flush out. (See Flushing Procedure on page 12.)
(b) Damaged or missing return spring.
– Replace.
(c) Damaged riser.
– Replace.
Poor distribution pattern (a) Nozzle plugged with debris.
– Clean or replace nozzle.
(b) Nozzle orifice damaged.
– Replace nozzle.
(c) Low operating pressure.
– Determine why system overloaded and correct.
8
Figure 10
100 PSI
(7.0 kg/cm2)
80 PSI
(5.6 kg/cm2)
65 PSI
(4.6 kg/cm2)
50 PSI (3.5 kg/cm2)

Main Valve
PROBLEM POSSIBLE CAUSE – CORRECTIVE ACTION
Valve won't close (a) Continuous 24 VAC to sprinkler.
(Electric ) – Check controller for voltage source.
(b) Leak in pilot valve assembly.
– Replace pilot valve assembly.
(c) Plugged supply screen on piston.
– Clean or replace screen.
(d) Manual control selector on pilot valve assembly turned to "ON" position.
– Turn to "AUTO" position.
(e) Plunger movement restricted.
– Inspect and clean or replace.
(f) Valve cylinder misaligned with sprinkler body communication tube.
– Remove valve assembly and install correctly.
(g) Foreign object keeping valve from seating.
– Remove, clean and check valve for damage. Replace if necessary.
(h) Damaged piston seal or piston assembly.
– Replace valve assembly.
Valve won't close (a) Leak in control tubing.
(Hydraulic) – Isolate and repair.
(b) Pilot valve leak in controller.
– Confirm by observing constant dripping from discharge line of controller.
Refer to Controller Service Manual.
(c) Valve cylinder misaligned with sprinkler body communication tube.
– Remove valve assembly and install correctly.
(d) Foreign object keeping valve from seating.
– Remove, clean and check valve for damage. Replace if necessary.
(e) Damaged piston seal or piston assembly.
– Replace valve assembly.
Valve won't open (a) Control (field) wires severed.
(Electric) – Isolate and repair.
(b) No power to controller.
– Establish controller power.
(c) No power from controller to solenoid.
– Check for blown fuse and replace.
(d) Manual control selector on pilot valve assembly turned to "OFF" position.
– Turn to "AUTO" position.
(e) Pilot valve solenoid inoperative.
– Remove and replace.
(f) Pilot valve plunger movement restricted.
– Inspect, clean and/or replace.
(g) No supply from main valve.
– Debris in control tube, main valve assembly and/or communication
passages in body. Flush thoroughly.
Valve won't open (a) Plugged controller discharge line or discharge port in pilot valve.
(Hydraulic) – Verify by checking for discharge at discharge line when station is
activated. If no discharge, refer to Controller Service Manual.
Sprinkler Weeping (a) Damaged or blocked valve seat.
(Slow leak in valve) – Remove blockage and, if necessary, replace valve assembly.
(b) Damaged piston seal or piston assembly.
– Replace valve assembly.
(c) Low pressure on supply line .
– Check for low pressure reason and correct.
(d) Elevation of normally closed sprinkler exceeds 75' (22.9 m) differential.
Several valves on different (a) Control tubing leak which lowers supply pressure to other stations.
stations fail to close – Turn controller from station to station until a station is reached where
(Hydraulic) only valves on that station stay open. The leak would be in the tubing
on that station. Isolate and repair.
(b) Leak in supply line to controller.
– Verify by checking pressure in all control lines.
(c) Leak in controller pilot valve.
– Verify by constant discharge from controller.
(d) Plugged supply line filter.
– Replace filter if more than 3 psi (0.21 bar) differential exists.
9

10
Service Procedures ______________________________________________________________
Servicing Sprinkler Mechanism
Note: Refer to Figure 11 for the following procedure.
1. Remove the cap screw (2) and cap (3).
Note: During reassembly, ensure the cap is correctly aligned with main nozzle housing assembly (10).
2. Insert the hooked end of the multi-purpose tool (P/N 995-83) into the snap ring slot (4). Pull the snap ring inward towards the
sprinkler assembly, then upward to remove from the groove in body.
Note: During reassembly, ensure the snap ring is correctly installed and fully seated in the sprinkler body.
3. Insert the hooked end of the tool into the slot provided in the nozzle base above the back nozzle (7) position. Pull the riser
assembly until enough clearance to handle. Hold onto the riser body (13) and carefully extract it from the sprinkler body.
CAUTION: The seal/retainer (5) will eject (caused by the decompressing spring [6]) as it clears the sprinkler body.
4. Three small tabs are provided on the edge of the multi-purpose tool. Insert tabs into the debris filter screen (17). Holding the
plastic base of riser assembly, turn the screen counterclockwise to remove.
5. Remove the variable stator (16) from riser assembly.
6. Loosen the drive assembly retaining screw (14) 6–7 turns and pull the drive assembly (15) using a pair of pliers. See Figure 12.
Note: Do not remove the retaining screw completely as it is easily misplaced.
CAUTION: When removing or installing the drive assembly, do not use the turbine to pull the drive assembly. Use the
drive assembly body to extract it out. Failure to comply may cause separation of the drive assembly components.
Note: During reassembly, ensure drive assembly is properly aligned with the retaining screw.
7. Using a 5/8" nut driver (P/N 995-99), unscrew main nozzle (12) from nozzle assembly.
8. Using a 5/16" nut driver (P/N 995-105), unscrew the inner (8) and intermediate (9) nozzles as well as the back nozzle plugs.
9. Thoroughly clean and inspect all parts and replace as necessary. Reassemble in reverse order.
13
14
3
15
16
17
2
1
4
5
6
77
910 11 12
8
Figure 11 Figure 12
WARNING
NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED, DURING
MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE PROCEDURES. DIRECT
CONTACT WITH IRRIGATION SPRAY, A FAILED OR IMPROPERLY INSTALLED SPRINKLER CONNECTION OR
SPRINKLER COMPONENTS FORCIBLY EJECTED UPWARD UNDER PRESSURE CAN CAUSE SERIOUS INJURY.

Servicing Main Valve
1. See Warning above. To remove valve assembly, squeeze snap ring ears together with snap ring pliers (P/N 995-100) and
remove snap ring from sprinkler body. See Figure 13.
2. Use valve removal tool P/N 995-08 for DT35 or 995-09 for
DT55 to remove valve assembly from base of sprinkler body.
Valve removal tool is inserted into sprinkler body and pushed
through valve ribs. A slight twist will catch tool under ribs
enabling valve removal by pulling straight up and out. See
Figure 14.
Note: If valve removal tool is not available, use snap ring
pliers to grasp rib of valve cylinder assembly and pull up and
out of sprinkler body.
3. Reinstall valve assembly using valve insertion tool P/N 995-76
for DT35 or 995-101 for DT55 as follows:
• Load snap ring onto insertion tool carrier with stepped side
against carrier as shown in Figure 15. While holding snap
ring in compressed position, slide retainer clip in to hold snap
ring ears
• Load valve assembly on carrier as shown.
• Locate position of communication tube in bottom of sprinkler
body and orient insertion tool accordingly.
• Insert tool straight down into sprinkler body aligning bosses on t-handle with holes on sprinkler body flange. When valve
assembly clears vertical side wall ribs inside body, pull up on snap ring release mechanism (DT55 models only) and press valve
assembly into position. Snap ring will lock into groove when properly installed. Remove insertion tool and check snap ring to
confirm that it is fully seated in groove
WARNING
IF THE VALVE SNAP RING IS DIFFICULT TO REMOVE, RESIDUAL WATER PRESSURE MAY BE REMAINING IN THE
SYSTEM. TO PREVENT POSSIBLE SERIOUS INJURY DUE TO VALVE BEING EJECTED UPWARD UNDER
PRESSURE, CONFIRM THE FOLLOWING CONDITIONS EXIST PRIOR TO REMOVING THE SNAP RING AND VALVE.
A. WATER SUPPLY TO SPRINKLER IS SHUT OFF AT SOURCE.
B. ALL PRESSURE IS BLED FROM SYSTEM, INCLUDING CONTROL TUBES.
C. AC POWER IS DISCONNECTED AT SOURCE.
Figure 14Figure 13
Figure 15
Snap Ring Release
Mechanism
Stepped Side
of Snap Ring
Snap Ring In
Retainer Clip
Valve Assembly
Orientation In Carrier
Snap Ring
Released
Press Valve Assembly
Into Position
11

Servicing Pilot Valve
Note: Refer to Figure 16 for the following procedure.
1. Make sure that the water supply to sprinkler is
positively shut off and any residual pressure
has been bled off. If the sprinkler is
pressurized, main valve will open when the
pilot valve is disconnected from control tube.
2. Carefully remove turf and soil from the side of
the sprinkler to expose pilot valve and control
tubing.
3. Remove the two retaining screws from the
pilot valve housing.
4. Pull the pilot valve assembly away from the
sprinkler body and cut the control tubing just
below tube retainer. Unless pilot valve has
been previously removed, control tubing length
will be sufficient for re-connection.
5. Remove tube retainer and remaining piece of
control tubing from valve body fitting.
6. Remove the solenoid (1, 2 or 3) by turning it
counterclockwise.
7. Remove the retaining nut (18) and washer
(17) from the pressure adjuster (11) and pull
the pilot valve body assembly out of housing
(16).
8. Remove diaphragm assembly (15), piston
(14), spring (13), traveling adjuster (12),
pressure adjuster (11) and o-ring (7).
9. Remove selector shaft assembly (9) and plunger assembly (5). (The selector shaft retains the plunger in the valve body.)
10. Thoroughly clean and inspect all parts. Replace damaged parts as necessary and reassemble in reverse order.
Note: Refer to Illustrated Parts Breakout Book, form number 368-0044 for service part numbers.
Flushing Sprinkler ________________________________________________________________
1. With sprinkler operating, carefully step down on center of cap several times. Water will flow around riser and flush out debris.
2. Cycle sprinkler on and off several times to check for proper retraction. Cap should be even with top of body flange when fully
retracted. If riser sticks in up position, check for debris lodged between riser and body. Flush out all debris. Remove sprinkler
mechanism if necessary.
© 2007 The Toro Company, Irrigation Division Form Number 373-0424 Rev. 2
WARNING
NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED, DURING
MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE PROCEDURES. DIRECT
CONTACT WITH IRRIGATION SPRAY, A FAILED OR IMPROPERLY INSTALLED SPRINKLER CONNECTION OR
SPRINKLER COMPONENTS FORCIBLY EJECTED UPWARD UNDER PRESSURE CAN CAUSE SERIOUS INJURY.
WARNING
NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED, DURING
MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE PROCEDURES. DIRECT
CONTACT WITH IRRIGATION SPRAY, A FAILED OR IMPROPERLY INSTALLED SPRINKLER CONNECTION OR
SPRINKLER COMPONENTS FORCIBLY EJECTED UPWARD UNDER PRESSURE CAN CAUSE SERIOUS INJURY.
2
1
3
5
7
6
4
8
9
16
17 18
11 12
13
14
15
10
Figure 16