MACGREGOR DS302 Pressure Switch 388 3600-801
MacGregor Hägglunds
New product
The MACGREGOR DS302 388 3600-801 is a high-pressure electrical pressure switch used in marine hydraulic applications associated with MacGregor equipment.
The actual units shown here carry the following identification:
Manufacturer: MacGregor
Type / Model: DS 302
Part Number: 388 3600-801
Reference Number: 31006918
Maximum Pressure: Pmax = 600 bar
Electrical Rating: max. 24V DC 5A
Electrical Rating: max. 250V AC 5A
Contact Arrangement: Changeover switching contact shown on nameplate
Application Category: Marine hydraulic pressure monitoring / switching
An international shipment record independently describes this exact specification as “PRESSURE SWITCH 388 3600-801 DS 302 PMAX=600 BAR MAX:24V DC 5A MAX 250V AC 5A, MACGREGOR.”
This distinction is important.
The Chinese description supplied with the equipment says:
MacGregor 麦基嘉 DS302 克令吊压力传感器
which can be translated approximately as:
MacGregor DS302 crane pressure sensor.
Online sellers also sometimes call DS302 a pressure sensor. One current page, for example, titles 388 3600-801 as a pressure sensor.
However, the photographed DS302 has a mechanical/electrical switching contact diagram and is rated for switching loads of 24VDC 5A and 250VAC 5A. Trade documentation for the exact part also classifies it as a pressure switch.
Therefore, the technically stronger product name is:
We still retain pressure sensor in the SEO vocabulary because many international buyers use that phrase when searching for the part.
A pressure switch monitors hydraulic pressure and changes an electrical contact when the pressure reaches its configured switching threshold.
Unlike an analogue pressure transmitter that normally sends a continuously varying signal such as 4–20 mA, a pressure switch principally provides a discrete electrical ON/OFF or changeover contact state.
This makes it useful for functions such as:
Hydraulic pressure confirmation
Pressure permissives
Safety interlocks
Alarm initiation
Control sequence feedback
Pressure-dependent equipment operation
The precise switching pressure and function of a DS302 must be verified from the vessel's MacGregor hydraulic drawings and the original switch configuration.
The photographed unit is clearly marked:
This should not be misunderstood as automatically meaning that the switch operates at 600 bar.
Pmax identifies the maximum permitted pressure stated on this particular unit.
The actual switching/set pressure may be substantially below that maximum and depends on the original equipment configuration.
This distinction is critical when sourcing a replacement.
The photographed switch is marked:
and:
Trade documentation for 388 3600-801 confirms the same ratings.
This indicates that the DS302 is designed to switch an electrical circuit rather than act merely as a passive hydraulic sensor.
The MacGregor label includes a small contact diagram with:
1
Q2
Q3
The diagram shows a changeover switching function.
In a typical pressure-switch application, pressure movement mechanically changes the internal contact state, allowing the control system to detect whether the required hydraulic condition has been reached.
Actual terminal wiring must be checked from the installed MacGregor drawing rather than assumed only from a generic pressure-switch diagram.
Shipboard hydraulic machinery relies on correct pressure to perform controlled movements safely.
A pressure switch can serve as a simple but important confirmation that:
Hydraulic pressure is available
An actuator has reached a pressure-dependent state
A safety interlock may be released
Pressure is too high or too low
A control sequence can continue
Failure of a pressure switch can therefore create symptoms that look like a larger hydraulic or automation problem.
For MacGregor DS302 and other marine crane/hydraulic spare-parts enquiries, SM MARINE SERVICE™ supports worldwide sourcing through www.smmarineservice.com.
The DS302 is commonly marketed in the marine spare-parts market as a MacGregor crane hydraulic pressure switch / pressure sensor.
The Chinese term 克令吊 specifically refers to a ship's crane / cargo crane in this context.
However, without the original vessel drawing we should not claim that this exact 388 3600-801 belongs to every MacGregor crane model.
The correct statement is:
DS302 is a MacGregor high-pressure switch used in applicable marine hydraulic machinery and crane-control installations.
MacGregor manufactures multiple forms of marine cargo-handling and deck machinery.
Pressure switches of this class may be associated with hydraulic control arrangements for applications such as:
Cargo Cranes
Deck Cranes
Hatch Cover Systems
RoRo Ramps / Doors
Hydraulic Deck Machinery
Exact compatibility remains equipment-specific.
The most important exact procurement reference from your stock unit is:
This search should also be written without spaces:
and:
because marine purchasing databases and sellers format MacGregor part numbers differently.
A current marine-parts listing also identifies the exact combination:
MacGREGOR DS 302 388 3600-801.
The pictured switch also carries:
This number is especially important because it also appears on other publicly listed DS302 pressure-switch configurations.
For example, a documented DS302 3877053-801 300 bar unit also carries 31006918.
This tells us something important:
31006918 alone should not be used to assume that two DS302 pressure switches have identical pressure configuration.
The complete part number and pressure rating must also be matched.
The DS302 family appears in several marine-market configurations.
One well-documented related variant is:
This variant is documented with the same electrical ratings:
24VDC 5A
250VAC 5A
but with Pmax 300 bar, not 600 bar.
Other market listings show DS302 references such as:
associated with 300-bar DS302 switches.
These variants are valuable related-search keywords, but:
The full MacGregor part number and switch setting must be checked.
This is a particularly important replacement distinction.
Photographed unit:
Pmax = 600 bar
Published related DS302:
Pmax = 300 bar.
Both may use the name DS302 and both can carry 31006918, but that does not make them identical.
Always source the replacement by:
DS302 + Complete Part Number + Pressure Data + Electrical Rating + Existing Photograph
One web listing describes 388 3600-801 as a 0–400 bar, 4–20 mA pressure transmitter.
That information conflicts with both:
388 3600-801 as a pressure switch with Pmax 600 bar.For this reason, this SM MARINE SERVICE™ blog does not use the unverified 0–400 bar / 4–20 mA specification for the photographed part.
That technical accuracy is important when a vessel is ordering a safety/control component.
In a marine hydraulic circuit, the DS302 may be electrically connected to:
PLC digital input
Relay-control circuit
Crane control system
Safety/interlock circuit
Alarm circuit
When hydraulic pressure crosses the configured switching point, the internal electrical contact changes state.
The vessel-control system can then react according to the programmed hydraulic sequence.
Do not immediately replace the switch.
Check:
Actual hydraulic pressure
DS302 electrical contact state
Cable and connector
Control input / PLC input
Hydraulic leakage
Pressure adjustment / setpoint
A correctly functioning pressure switch cannot indicate pressure if the hydraulic circuit never reaches the required value.
Possible causes include:
Insufficient hydraulic pressure
Incorrect setpoint
Mechanical switch failure
Blocked pressure port
Internal wear or contamination
Electrical contact damage
Check:
DIN-style electrical connector
Loose terminals
Cable strain
Contact oxidation
Hydraulic pressure fluctuation
Vibration
Shipboard crane machinery is exposed to vibration and repeated hydraulic pressure cycling.
The switching setpoint may require verification against a calibrated hydraulic test source.
Do not adjust a safety-related switch arbitrarily without the correct MacGregor/system procedure.
Inspect:
Switch continuity
Connector wiring
PLC input voltage
Control relay
Terminal connections
The hydraulic component and the electrical control circuit should be diagnosed separately.
Testing should be carried out by qualified personnel using a suitable pressure source.
A proper test generally requires verification of:
Contact condition at low/no pressure
Switching pressure
Reset / hysteresis point where applicable
Electrical continuity
Pressure leakage
Repeatability
Because the photographed unit is rated Pmax 600 bar, high-pressure testing requires equipment and procedures appropriate for that pressure class.
Before ordering a replacement MacGregor DS302, verify:
Manufacturer: MacGregor
Model: DS 302
Full Part Number: 388 3600-801
Reference: 31006918
Pmax: 600 bar for the photographed unit
Electrical Rating: max. 24VDC 5A / max. 250VAC 5A
Contact Diagram: Match original
Hydraulic Connection: Match original
Pressure Setpoint: Verify vessel/equipment requirement
Application: Crane / hydraulic system details
Photograph: Recommended
Do not purchase solely by searching:
“MacGregor DS302”
because multiple pressure configurations exist.
For this exact model and other MacGregor marine hydraulic components, buyers can contact SM MARINE SERVICE™ through www.smmarineservice.com.
SM MARINE SERVICE™ supplies and sources MACGREGOR DS302 pressure switches, marine crane pressure sensors, hydraulic control switches and MacGregor deck-machinery spare parts.
Important enquiry references include:
DS 302
388 3600-801
3883600801
31006918
Pmax 600 bar
24VDC 5A / 250VAC 5A
Related DS302 searches can include:
387 7053-801 – 300 bar
3880359-801 – DS302 related 300-bar variant
These related variants should be used for identification/search purposes and not assumed interchangeable.
Available condition may include:
New • Used • Refurbished • Reconditioned • Tested Working
It is a pressure-switch family used in applicable MacGregor marine hydraulic/control systems.
388 3600-801
31006918
The nameplate states:
Pmax = 600 bar
Independent trade documentation confirms the same specification for 388 3600-801.
The exact photographed 388 3600-801 is best identified as a pressure switch. It has a changeover electrical contact diagram and 5A switching ratings. “Pressure sensor” remains a common market/search description.
The pictured unit does not show a 4–20 mA output specification. Its label instead shows a switching contact and 24VDC/250VAC contact ratings. A web listing claiming 4–20 mA conflicts with stronger physical and trade evidence for this exact part.
max. 24V DC 5A
max. 250V AC 5A
No. Other DS302 variants with different pressure ratings also carry 31006918, so the complete part number and pressure data must be checked.
Do not assume so. 3877053-801 is publicly documented with Pmax 300 bar, whereas the pictured 3883600-801 is Pmax 600 bar.
It is widely marketed for MacGregor marine hydraulic/crane applications. Exact compatibility with a specific crane must be confirmed from the equipment documentation.
SM MARINE SERVICE™ supplies and sources MacGregor crane, hydraulic and marine deck-machinery spare parts for worldwide customers.
MACGREGOR DS302 Pressure Switch, Part No. 388 3600-801, Ref. 31006918, Pmax 600 bar, rated max. 24VDC 5A and max. 250VAC 5A for applicable marine crane and hydraulic control systems. Commonly searched as MacGregor DS302 pressure sensor, crane pressure sensor, hydraulic pressure switch and 600-bar pressure switch. Related DS302 variants include 387 7053-801 and 3880359-801, but pressure ratings and configurations must be verified before replacement. New, Used, Refurbished and Reconditioned MacGregor marine spare parts available from SM MARINE SERVICE™ with worldwide shipping and technical support.
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
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