Mono Compact C13D Pumps

Spare Parts for Compact C13D Pumps

This page lists replacement and compatible spare parts for Mono pumps.
Pump Spares Direct is an independent supplier and is not affiliated with, endorsed by, or authorised by Mono.

Image shown for pump identification purposes only.

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Spare Parts List

Select the required parts below to include them in your quote request.

Item = exploded-diagram reference from the Mono Compact manual (OMMP/032/01). Ordered by pump model + item. This page is for the Mono Compact C14A. The mechanical seal carries the real OEM part number for this model's shaft size.

Select Qty Item Part Number Description Material / Spec
122A22AStator (specify elastomer)C14A stator 3.5 kg; nitrile std / others to suit fluid
125A25ARotorC14A rotor 2.6 kg; hard-chrome / stainless
126A26ACoupling RodC14A rod/joint 1.2 kg
129A29ACoupling Rod Pin-
129B29BCoupling Rod Pin-
129C29CShaft Pin-
132A32ADrive ShaftC14A shaft 1.7 kg
110AM065139GMechanical Seal (DIN L1K, 65mm shaft)OEM seal M065139G
165A65AMechanical Seal Carrier / Gland Section-
166A66AAbutment Ring-
174A74ASleeve (Rotor / Shaft)-
174B74BSleeve (Rotor / Shaft)-
128A28ASealing Cover-
128B28BSealing Cover-
101A01ABody (Standard Cast Iron)-
123A23ASuction Chamber-
123B23BSuction Chamber Extension-
124A24AEnd Cover-
142A42AThrower-
115A15AThrower Guard-
162A62ASupport Foot-
120B20BGasket - GlandNon-asbestos
1P401P401Toroidal Seal Ring-
1P402P402Toroidal Seal Ring-
1P403P403Spiral Retaining Ring-
1P404P404Spiral Retaining Ring-
1P405P405Tie - Sealing Cover-
1P406P406Tie - Sealing Cover-
195A95AStator Tie Rod-
1P104P104Hex Head Bolt-
1P105P105Hex Nut-
1P106P106Washer-
1P107P107Single Coil Spring Washer-
1P109P109Hex Nut-
1P201P201Taper Plug-
1P202P202Taper Plug-
1P203P203Hex Socket Setscrew-
1P509P509Toroidal Seal Ring-
1P510P510Toroidal Seal Ring-

Item references are from the OEM manual for identification only; weights are guidance per the manual and exact build (stage count, quantities, gland packing vs mechanical seal) is confirmed at quote. Some references may not appear on every build. Associated washers/nuts and lubricants are available per the manual on request.

Exploded Parts Views 

Exploded view shown for reference only. Part numbering may vary by configuration.

Key Technical Specifications 

Parameter Value
Model / Curve C13D 4 Stage
Rated Power Varies by application (typically 1.5 - 4.0 kW)
Voltage / Frequency 240V/415V / 50Hz (other voltages available)
Rated Current Application dependent
Discharge Connection Flanged (size varies by application)
Impeller Type Progressive Cavity (Helical Rotor/Stator)
Installation Type Horizontal Baseplate Mounted

Troubleshooting, Common Faults & Solutions

No Discharge from Pump

Likely Cause: Incorrect rotation direction, pump unprimed, or blocked delivery line

Action / Part: Verify motor rotation matches nameplate arrow, prime pump with liquid, clear blockages in discharge pipework

Loss of Capacity / Reduced Flow

Likely Cause: Worn rotor/stator elements, insufficient NPSH, or air entering suction line

Action / Part: Replace rotor (25A) and/or stator (22A), increase suction head, check gland adjustment and pipe joints for air leaks

Pump Stalls at Start-Up

Likely Cause: Product viscosity too high, low voltage, or drive train failure

Action / Part: Heat product to reduce viscosity, verify electrical supply voltage, inspect coupling rod (26A) and pin joints (29A, 29B, 29C) for damage

Excessive Noise and Vibration

Likely Cause: Misaligned coupling, worn bearings, or insecure pump mounting

Action / Part: Check and adjust alignment to motor/gearbox, replace shaft bearings (lubricate with BP LC2 grease), tighten all baseplate mounting bolts

Excessive Gland or Seal Leakage

Likely Cause: Worn drive shaft, damaged mechanical seal, or inadequate gland flush

Action / Part: Replace drive shaft (32A) if gland area worn, install new mechanical seal assembly (10A), ensure proper seal flush fluid flow

Motor Overheats / Excessive Power Draw

Likely Cause: Delivery pressure above rated limit, gland overtightened, or pump speed too high

Action / Part: Check for delivery line blockages, loosen packed gland to allow slight drip, reduce pump speed, verify relief valve setting

Rapid Stator Wear / Premature Failure

Likely Cause: Dry running, abrasive product, or product temperature exceeding rating

Action / Part: Install dry-run protection device, ensure pump always primed before starting, cool product or upgrade to temperature-rated stator material, replace with new stator (22A)

Stuffing Box Rapidly Consumes Packing

Likely Cause: Worn shaft surface in packing area

Action / Part: Inspect drive shaft (32A) for wear grooves, replace shaft if gland area damaged, ensure regular gland maintenance schedule

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