SCHOTTEL SRP Series User manual

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
Seite
1
SCHOTTEL - RUDDER PROPELLER
"SRP"
OPERATING INSTRUCTIONS
Section Page
1 DESCRIPTION 2
1.1 General 2
1.2 Design 2
Fig. 1 Cross-sectional View 3
1.3 Lubrication 4
1.4 Compensating Fin 4
1.5 Steering Worm Gears 4
2 OPERATION 6
2.1 Measures to be taken when Operating a New 6
or Repaired SRP
2.2 Regular Checks prior to Start-up 6
Table of the Oil Quantities 7
2.3 Checks during Operation 8
2.4 Swinging out the SRP 8
3 MAINTENANCE 8
3.1 Maintenance Schedule 8
3.2 SRP Gear-box Oil Change 10
3.3 Attached Steering Gearing Oil Change 10
3.4 Checks on the Lower Gearing 12
3.5 Measures to be Taken for Taking an 12
SRP out of Operation for up to 6 Months
3.6 Setting the Compensating Fin 12
3.7 Air Filter Cleaning 14
3.8 Rudder Position Indicator Adjustment 14
4 INSTALLATION 14
4.1 Schottel Navigator Installation 14
4.2 Installation of the SRP in the Well 14
4.3 Propeller Installation 16
RECOMMENDED LUBRICANTS 19

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
Seite
2
1. DESCRIPTION
1.1 GENERAL
The SCHOTTEL rudder propeller, hereafter called SRP, is a
Z-drive unit. The lower gearing with the propeller has been
designed to be able to infinitely turn to port or starboard,
so that the full propeller thrust can be directed to any
desired direction, thus obtaining the optimum combination of
propulsion and steering.
The power is transmitted through two pairs of spiral bevel
gears made from high quality material.
The steering is transmitted through such a pair of bevel
gears.
All bevel gears have been hardened and lapped in pairs
The lower gearing with associated screws and gaskets is made
of corrosion resistant material.
1.2 DESIGN
Legend for Fig. 1
1) Vent cock
2) Plug screw and oil level sight glass at the side
3) Oil slinger, only for SRP's up to SRP 100
4) Plug screw
5) Bevel gear set for the drive in the upper gearing
6) Float switch for lack of oil warning
7) Plug in the vertical drive shaft
8) Flange for input drive shaft
9) Flange for steering drive shaft
10) Bevel gear set for steering
11) Carrying pipe
12) Steering pipe
13) Power transmission shaft
14) Seal between carrying pipe and steering pipe
15) Propeller
16) Sealing of the propeller shaft
17) Lower gearing
18) Magnetic plug

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
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Figure 1
Cross-sectional View

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
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Seitenz. 19
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To avoid air from entering the propeller, a cover plate
(Figures 4/2 or 6/2) can be provided. In addition, a nozzle
can be provided for increasing the thrust.
1.3 LUBRICATION
The SRP features oil bath lubrication, i.e. it is filled with
oil. An oil tank, either directly mounted on the SRP or
separately mounted, is used as expansion and compensating tank.
The oil in the SRP is circulated during operation and cooled in
the lower section. The circulation is accomplished by an oil
slinger (Figure 1/3) for sizes up to SRP 100, and by a worm gear
(Figure 7) for sizes SRP 150-300. This oil worm gear is located
on the power transmission shaft and forces the oil down. A
sight-glass (Figure 1/2) on the oil tank and an electric warning
switch (Figure 1/6) are provided for checking the oil level; the
warning switch closes a contact as soon as the specified oil
quantity is fallen below. The attached steering worm gear
(Figure 2) are sealed from the upper gearing and are equipped
with a separate oil fill hole.
1.4 COMPENSATING FIN
The torque of the vertical power transmission shaft (Figure 1/13)
is transmitted through the bevel gear pair of the lower gearing
of the SRP to its housing. The torque must be fully absorbed by
the steering gear, unless it is compensated.
For this reason, the manually controlled SRP's (steering systems
S 100, S 200 and S 300) are equipped with compensating fins
(Figures 4/4, 5/1 or 6/4).
1.5 STEERING WORM GEARS (See Figure 2)
One, or, in case of higher outputs, two (DST) worm gears can be
mounted at the side of the upper gearing. The steering drive is
accomplished by a hydraulic motor attached to each worm gear.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
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Figure 2 Steering Worm Gear
Design for Navigator
Design for Well Installation
Plug screw with
dipstick
Hydraulic
motor
Rudder position
transmitter
Worm gear
Magnetic plug
(oil drain plug)
Second oil
drain plug
Oil level
sight glass
Rudder position
transmitter
Oil fill hole
Hydraulic motor
Magnetic plug
(oil drain plug)

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
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2 OPERATION
2.1 MEASURES TO BE TAKEN WHEN OPERATING A NEW OR REPAIRED SRP
The inside of the SRP is preserved after the test stand run.
The corrosion preventative lasts for about 6 months when stored
in dry ambient air (no sea-water atmosphere). Fill in oil
before operating the system.
2.1.1 Filling-in Oil
To fill in oil, remove plug (Figures 1/2 and 1/4), fill in oil
through hole (Figure 1/4) until it overflows, reinstall the plug,
then carry on filling through hole (Figure 1/2).
The oil level must be continuously checked during the first
operating hours after having started a new or repaired SRP or
after an oil change, because replenishing may become necessary
due to possibly existing air traps. The required oil quantities
are specified in the table on page 7, these data, however, are
only reference values, since the oil quantities may deviate up
to 101, depending on the configuration.
The oil for the steering worm gear (Figure 2) is filled in
through the bore of the top plug screw; the oil quantity is
approximately 8 litres for each worm gear. For the oil level
check, either a sight glass or a dip stick (depending on the
arrangement) is provided.
2.2 REGULAR CHECKS PRIOR TO START-Up
- The vent cock (Figure 1/1) of the oil tank must be open
(does not apply to separate oil tank with air filter).
- On the separate oil tank, the shut-off valve below the oil
tank must be open.
- Check the SRP oil level, tand also the oil level of the
possibly attached steering worm gears.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
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Table of Oil Quantities
Type SRP
15/30
50 75 100 150 225 300
800 7,5 11,5
900 8 12 15
10OO 8,5 13 16 21,5
1100 9 14 17 22,5
1200 9,5 15 18 23,5
1300 10 16 19 24,5
1400 10,5 16,5 20 25,5 45
1500 11 17,5 21 26,5 46,5
1600 11,5 18,5 22 27,5 48
1700 12 19 23 28 50 90
1800 12,5 20 24 29 51,3 93 106
1900 13 20,5 25 30 53 96 109
2000 13,5 21,5 26 31 54,5 99 113
2100 14 22,5 27 39 56 102 116
2200 14,5 23 28 33 58 1O6 119
2300 24 29 34 59,5 109 122
2400 25 30 34,5 61 112 126
2500 26 31 35,5 63 115 129
2600 27 32 36,5 64,5 113 132
2700 27,5 33 37 66 121 135
2800 28,5 34 38 67,5 125 138
2900 29 35 39 69,5 128 141
3000 30 36 40 71 131 145
3100 37 41 72,5 134 148
3200 38 42 74 137 151
3300 39 43 76 140 154
3400 40 44 77,5 144 158
3500 45 79 147 161
3600 46 81 150 164
3700 47 82,5 164 179
3800 47,5 88 168 183
3900 48,5 90 171 186
4000 49 91,5 175 19O
4200 95 182 197
4400 99 189 205
4600 102 197 212
4800 1O6 204 219
5000 109 211 227
5200 219 234
5400 226 241
5600 249

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
Seite
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2.3 CHECKS DURING OPERATION
- Check the condition of the SRP gear-box lubricating oil; if
the oil has a milky colour, water has entered the lower
section: Have it repaired.
- Check the oil level of the SRP.
- In case of manual steering, the force to be applied by hand
to the steering wheel shall be approximately the same in both
directions. If this is not the case, correct the fin setting
at the lower section, to do this, see section 3.5.
2.4 SWINGING OUT THE SRP
- Disconnect the drive shaft from the engine mounted clutch
and from the SRP; the shaft must not be disconnected only
from the SRP under any circumstances (danger of accidents).
Note:
Close the vent cock on the attached oil tank (Figure 1/1)
(see section 3.8).
3 MAINTENANCE
3.1 MAINTENANCE
After 50 Operating Hours on a New SRP
Check the mounting screws of the lower section (Figure 7/2) and
the cover plate or nozzle (Figure 4/1 or 6/1) for security of
attachment, retighten, if required; for the torque loads, see
the table on page 13.
After 250 Operating Hours on a New SRP
Change the oil of the SRP gear-box (without possibly attached
steering worm gears) in accordance with section 3.2.
After every 250 Operating Hours, at least every three months
Clean the air filter of the separate oil tank in accordance
with section 3.7.
After every 2500 Operating Hours, at least annually
Change the oil of the SRP gear-box (without possibly attached
steering worm gears) in accordance with section 3.2.
After every 5 years
Change the oil of the attached steering worm gears in accordance
With section 3.3.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
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Figure 3
oil suction pump
SRP Well Installation

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
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3.2 SRP GEAR-BOX OIL CHANGE
The oil can be drained by unscrewing the magnetic plug
(Figure 1/16) or pumped out from the top; observe the relevant
laws for keeping waters clean.
Note:
When the magnetic plug has been removed, check it for sticking
particles. Fine abrasion is normal for running-in new or
repaired systems, small fragments, however, indicate gear teeth
or bearing damages, which will also be noticed by noisy running,
In such a case, the drive must be checked and repaired, if
required.
Clean and reinstall the magnetic plug, checking the seal for
proper condition.
If the oil has to be pumped out (see Figure 3) e.g. for well
installations, remove the oil warning switch (Figure 1/6).
Then pull out the plug (Figure 1/7) on SRP's up to SRP 100 by
means of an M 10 threaded rod.
Pass the hose (18 mm outside diameter maximum) of the suction
pump through the bore of the vertical shaft down to the bottom
of the lower gearing and pump out the oil. Then reinstall the
plug again, refit the oil warning switch, and fill in the oil
as described in section 2.1.1.
3.3 ATTACHED STEERING GEARING OIL CHANGE (See Figure 2)
The oil change is described for one gearing, it also applies to
the DST arrangement.
Remove the top plug and bottom magnetic plug for draining the
oil; observe the note in section 3.2. Reinstall the magnetic
plug, checking the seal for proper condition. On the vertically
arranged worm gear, the oil must also be drained from the
second oil drain plug (see Figure 2).
For filling in the oil, see section 2.1.1.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
Seite
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Figure 4
Figure 5
Figure 6

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
Seite
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3.4 CHECKS ON THE LOWER GEARING
If the ship is hauled up or the SRP swung out or removed, the
following checks should be carried out:
- Check all gaskets on and above the lower gearing (Figures
1/14 and 1/16) for oil leaks, have repaired, if required.
- Check propeller for damage. Since there is the risk that
the teeth of the gears may break if there is severe damage
to the propeller, the gears must be checked.
- The space between propeller hub and lower gearing must be
free from foreign matter. If present, dismount the propeller
remove foreign matter, and check the seals.
- Check the mounting screws of the lower gearing and cover
plate or nozzle for security of attachment, retighten, if
required. For torque loads, see page 13.
3.5 MEASURES TO BE TAKEN FOR TAKING AN SRP OUT-OF-OPERATION FOR UP
TO 6 MONTHS
If an SRP is taken out-of-operation or removed due to damages,
it must be filled with fresh oil during the storage, in order
to prevent corrosion damages. To do this, close the vent cock
on the oil tank.
Prior to transporting the SRP, drain the oil.
CAUTION:
The relevant laws on environmental protection must be
absolutely complied with.
SETTING THE COMPENSATING FIN
See Figures 4, 5 and 6
The fin (Figures 4/4, 5/1 or 6/4) is supplied in normal
position. If the lower section is found to steer easier to
one side, loosen clamping screws (Figures 4/3, 5/2 or 6/3) and
adjust the fin in such a way that the rear edge is adjusted
1 to 2 mm in the same direction in which the lower section runs
out.
Retighten the clamping screws.
Continue the compensating process until the SRP is balanced.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
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Torque Loads for the Mounting Screws of
A: Lower Gearing
B: Copper plate or nozzle
Torque
SRP Type
Thread size Wrench Size mm
Nm mkp
A
M 10 17 37 3,8
30/15
B M 12 19 65 6,6
30/31 A
B M 12 19 65 6,6
50/50
50/51 A B M 12 19 65 6,6
A M 14 22 114 11,6
76/75
76/76 B M 16 24 177 18,1
A M 14 22 114 11,6
100/l00
100/103 B M 16 24 177 18,1
A M 16 24 177 18,1
150/152
B M 20 30 346 35,3
225/226 A
B M 24 36 599 61,1
300/300 A
B M 24 36 599 61,1

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
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3.7 AIR FILTER CLEANING (on separate oil tank)
- Remove any dirt from around the filter.
- Unscrew the air filter.
- Wash in clean petrol.
- Blow out with compressed air from the inside.
- Wet filter texture with a few drops of gear lubricating oil.
- Screw in air filter by hand only.
3.8 RUDDER POSITION INDICATOR ADJUSTMENT
The rudder position indicator must be adjusted in such a way
that the straight-ahead position of the lower section
corresponds to the indication. Since the lower section of the
SRP is not visible when installed in the well, a feeler pin
(Figure 7/1) is provided at the upper gearing, which, when
pushed in by hand, is engaged with a groove at the straight-
ahead position. After the rudder position indicator has been
adjusted, pull out the feeler pin (Figure 7/1) again.
4 INSTALLATION
4.1 SCHOTTEL NAVIGATOR INSTALLATION
If special instructions have to be observed for this
installation, refer to the applicable operating instructions
of the navigator.
4.2 INSTALLATION OF THE SRP IN THE WELL
See Figure 7
- Remove the lower section (9) after having unscrewed the
hexagon nuts (2).
- Install the SRP in the well foundation (5) with rubber
gasket (4).
- Attach the lower section (9) again, checking sealing faces
and sealing ring for cleanliness.
Caution;
On the SRP's 150 ... 300, install the power transmission
shaft (6) in such a way that the worm (7) is located at
the bottom.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
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Figure 7 Installation of the SRP in the Well
1) Feeler pin
2) Hexagon nut
3) Steering pipe flange
4) Rubber gasket
5) Well foundation
6) Power transmission shaft
7) Worm
8) Connecting sleeve
9) Lower section
10) Rubber gasket
11) Well

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
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- Install the SRP with well foundation (5) completely with
rubber gasket (10) in well (11).
- Connect the electric oil warning system to the flow switch
(Figure 1/6) by means of a 2 x 1.5 mm2 cable.
4.3 PROPELLER INSTALLATION
The installation of a flanged-on propeller in the form of a
pulling configuration does not cause any problems, so that it
is not described herein in more detail. The torque load for
the mounting screws (M 16) is 177 Nm (18.1 mkp).
When installing a propeller on a tapered shaft (see Figures 8
and 9), pay attention to the following points:
- Remove the fitting key (Figure 8/5 or 9/1) and check that
it can be pushed through the slot of the hub bore, remachine
the slot, if required.
- Install the fitting key again, paying attention to secure
seating by the clamping sleeve.
- When installing a new propeller (spare propeller), apply
dye check paint onto the taper of the propeller shaft,
provisionally fit the propeller and check the wear pattern;
the supporting surface must be at least 70$, remachine the
propeller hub, if required.
- The labyrinth space between propeller hub and gear-box must
be free from foreign matter.
- The seating faces of the propeller shaft and hub bore must
be cleaned; the hub seat must be fitted in a hand dry
condition.
- After the propeller has been fitted (Figure 8/1 or 9/7) screw
on the propeller nut (Figures 8/3 or 9/5) and tighten the nut
by means of a wrench hammer (normally, the wrench hammer
forms part of the scope of delivery of the SCHOTTEL rudder
propeller). When the arrangement is according to Figure 8,
pay attention to the tab washer (Figure 8/2).
Caution:
When tightening the propeller nut by means of the wrench
hammer, the propulsion system must be disengaged, in order
to prevent gear teeth and bearings from being damaged.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
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Figure 8
figure 9

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
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- Lock the propeller nut according to Figure 8 by forcing the
tab washer (Figure 8/2) into the slots of the propeller hub
and lock the propeller nut.
- Lock the propeller nut according to Figure 9 by tightening
the clamping screws (Figure 9/2) , for the specified torque
loads of the clamping screws (Figure 9/2), see the following
table, the values apply to slightly oiled screws.
Torque load
Thread size Wrench size Mm mkp
M 8 13 27,5 2,8
M 10 17 52 5,3
M 12 19 88,3 9
- Lock the screws (Figure 9/2) by means of locking wire
(1.5 mm diameter).
- Fit the propeller cap (Figure 9/4), checking the sealing
ring (Figure 9/6) for proper condition, replace, if
required.
- Screw in the screws (Figure 9/3), checking the USIT rings
under the bolt heads for proper condition. Tighten the
screws (Figure 9/3) only to such an extent that the
bottom of the propeller cap (Figure 9/4) does not bend.
Note:
The mounting screws (Figure 9/3) must be secured against
loosening; the locking method differs in accordance with
the configuration. This may be accomplished by means of
locking wire, tab washers or by using Loctite No. 241.

SCHOTTEL
SRP 15 .... SRP 300 No. BA 103 E
Dat.
1-12-77
TD-NM-in
Seitenz. 19
Seite
19
RECOMMENDED LUBRICANTS
Brand Lubricating oil for
SRP drive
Lubricating oil for
Worm Gearing
Degol BG 68 (ISO)
Degol TU 68 (ISO) Degol BG 46O
Energol GR-XP 68 (ISO)
Energol IC-D 20
Energol HLP 68 (ISO) Energol GR-XP 460 (ISO)
Non-Leaded Gear Compound 68 Non-Leaded Gear Compound 46C
Spartan EP 68 Spartan EP 46O
Giran 68 ISO
Pontonic N 80
Dilano 20 W/20 Giran 460 ISO
Mobilgear 626
Mobilube GX 8O Mobilgear 634
Omala Oel 68 (ISO)
Gadinia 20 W/2O
Melina 1O W/30 Omala Oel 460 (ISO)
Meropa 68
Multigear Lubricant EP 80
Rando Oil HD CZ -68
Meropa 460
Multigear Lubricant EP 460
The load stage for the oils of the SRP drive must be above 12 of
the FZG-Test A 8.3/90 according to DIN 51354.