Views: 11 Author: Site Editor Publish Time: 2020-08-26 Origin: Site
1. Feed pump failure
1. The lift pump does not work
The oil cup is too tight to lock the lifting shaft
The crystals on the lifting shaft jam the lifting pump, making the lifting pump unable to work
The rubber of the reversing rubber cover falls off, and the "O" seal is not tightly sealed, making the lifting pump unable to work
The material-lifting pump was inserted into the raw material barrel incorrectly, causing foaming in the pump
The black material is stuck in the pump and cannot work
Insufficient air pressure or no air source
The outlet filter of the feed pump is blocked
The friction resistance of the air motor piston is too large
The gun has no way out
The lower return spring in the cylinder has insufficient elasticity
2. Leakage of the lift pump
Due to long-term use, the "O" ring and "V" ring are worn
(Reversing rubber cover) wear
Air leakage at the thread of the reversing assembly
Reversing assembly falls off
3. Leakage of the lifting pump
Generally refers to the material leakage at the lifting shaft, tighten the oil cup to increase the pressure on the lifting shaft sealing ring
Leakage at other threads
4. The lift pump beats violently
No raw material in raw material barrel
The bottom of the pump is blocked
Raw material viscosity is too thick or too thin
Lifting bowl falls off
2. Booster pump failure
1. Booster pump leakage
Insufficient strength of the oil cup to press the seals leads to leakage
Long-term use of seal wear
2. There are black crystals on the shaft
The oil cup is not tightly sealed, and the booster pump shaft does not stop at the bottom dead center pump shaft. It stays for a long time after there is black material on it
Although the oil cup was tightened, the contaminated lubricant was not replaced
3. The pressure of the two raw materials is inconsistent than 2Mpa
1. The cause of the gun
Different sizes of holes on both sides of the tip
Gun body black material filter is partially blocked
The friction attachment is slightly blocked
The material channel before and after the raw material valve is not completely blocked
The friction attached discharge hole and the holes on both sides of the gun head are not aligned
There is residual material in the mixing chamber of the gun head
One of the raw materials is seriously leaking at the friction attachment
2. Reasons for raw materials
One of the raw materials is too thick
White material temperature is too high
3. Material pipe and heating
The material flow is not smooth due to incomplete blockage in the material pipe
The material pipe is folded into dead bends in many places, which makes the flow of raw materials not smooth
The heater is set too low for the raw material temperature
Raw material pressure gauge malfunction
One of the heaters failed
The heater is not completely blocked due to foreign matter
Material pipe and equipment do not match
4. Reasons for booster pump
Severe material leakage at the booster pump oil cup
The bottom of the booster pump is not tightly sealed
The lower valve body of the booster pump is not tightly sealed
The bowl of the booster pump is worn or the bowl holder is broken
The thread of the lower valve body of the booster pump is loose or the lower valve body falls off
Loose nut on top of booster pump shaft
Damaged "O" ring in the bottom of the booster pump
5. Reasons for lifting pump
The bottom of the lift pump is not completely blocked
The filter at the outlet of the lifting pump is not completely blocked
The lift pump does not work
Serious internal leakage of the lift pump
3. Uneven mixing of the two raw materials
1. Booster pump air source pressure
The triplet pressure reducing valve adjusts the air source pressure to be too low
The discharge pressure of the air compressor cannot meet the requirements of the foaming equipment
The air pipe from the air compressor to the foaming equipment is too thin and too long
Excessive moisture in compressed air hinders air flow
2. Material temperature
The heating temperature of the equipment is not enough for the raw materials
The initial temperature of the raw material is too low and exceeds the scope of equipment
4. The host does not work
1. Electrical reasons
The emergency stop switch is not reset
Proximity switch is damaged
Proximity switch position shift
Two-position five-way solenoid valve out of control
The reset switch is in the reset state
Insurance burnout
2. Causes of gas path
The solenoid valve airway is blocked
Freezing of solenoid valve airway
The "O" ring inside the solenoid valve is not tightly closed and the solenoid valve cannot work
The air motor is severely short of oil
The screw at the connection between the piston and the shaft in the cylinder is loose
3. Reasons for booster pump
The oil cup is too tight
Black material crystals on the lifting shaft are stuck
Unpredictable
The black material is dead in the pump
The pole screw is too loose
5. Pipeline failure
1. Pipeline channeling
The raw material in the raw material barrel is emptied
The bottom of the lift pump is blocked
The filter at the outlet of the lifting pump is blocked
The raw material is too thick
Failure of friction check valve
The white material temperature is too high, and a certain proportion of gas space appears in the material path system
The pressure of the raw material on one side is too high
2. The material tube is not heated
Heating wire open circuit, short circuit
Control system failure
Wrongly connect 220V to 380V power supply
3. The main heater of black and white material does not work
Wrong connection of 220V to 380V power supply will burn out the circuit
Circuit out of control
6. Spray gun failure
1. Gun body foaming
Close the two raw material ball valves and directly remove the two screws fixing the black and white material blocks
2. Gun leakage
The seal between the friction attachment and the gun tip is not tight
Friction and wear
Tip wear
Material leakage at the thread of the friction attached jacket
The seal between the friction attachment and the friction attachment is not tight.
3. The gun does not return after pulling the trigger
The "O" ring on the sliding rod close to the sliding rod piston is not tightly sealed
Wrong position of gun tail cap
The rear spring has insufficient elasticity.
Airway is not completely blocked
4. The gun does not work
Insufficient air pressure
Gun air path blocked
The gun piston circlip falls off
There is foam in the tip chamber
Sliding rod piston resistance is too large
The rubbing cover fails to be screwed in place and the gun head is stuck
Wrong position of gun tail cap
Excessive foreign matter in the slide bar channel:
o-ring wear
5. The gun leaks
Check all "O" rings
The CNMC-H Pneumatic Polyurethane Foam Sprayer is a professional-grade spray equipment designed for field polyurethane foam applications. Featuring an advanced compact design with easy component access, it simplifies control functions and significantly reduces maintenance time. Built for constructio
CTT EXPO 2026, the largest and most influential construction equipment exhibition in Russia and the CIS region, will be held at Crocus Expo in Krasnogorsk, Moscow from May 26 to 29. Hightop Group sincerely invites global clients and partners to its booth 1-146, where it will showcase a full range of compact construction equipment, including crawler excavators (HT20Pro, HT10B), wheel loaders (HTDL06, HTL28), skid steer loaders (HT382T, HT390) and material handling equipment (HT500Y-4 dump truck). On-site professional team will provide one-on-one consultations, live demonstrations and customized partnership solutions, helping visitors explore business opportunities in the Eastern European market.
Hightop Group’s brilliant appearance at SaMoTer 2026 in Verona, Italy. The brand displayed multiple flagship construction machinery that meets European emission standards. With outstanding product performance and green intelligent manufacturing concepts, it attracted numerous European merchants for consultation and cooperation. Hightop has won wide recognition in the European market and will keep focusing on eco-friendly and intelligent equipment research and development to further expand overseas business layout.
Shandong Hightop Group successfully debuted its HTJC430 Stone Crusher at CIM 2026 (Canadian International Mining & Metallurgical Exhibition) in Vancouver. The compact, mobile crushing solution stood out at Booth 341 for its small footprint, powerful performance, and durable tracked chassis, drawing strong interest from global mining and construction professionals. The event reinforced Hightop’s commitment to innovation and its expanding presence in the international mining equipment market.
Discover the CNMC-E3 Polyurethane Spray Foam Machine, a high-performance, versatile spray equipment designed for construction and insulation projects. With advanced mixing and heating systems, precise control, and easy operation, it delivers consistent and efficient foam application across roofs, walls, and pipelines. Learn its key features, applications, and benefits to enhance project efficiency, reduce material waste, and achieve long-lasting insulation results.
Shandong Hightop Group invites you to SaMoTer 2026 Italy. Visit our booth (Hall 10, C3-1) to explore our construction machinery, mini excavators, and discuss partnership solutions for the European market.
Shandong Hightop Group will attend CIM 2026 held May 3–5 at Vancouver Convention Centre and showcase its HTJC430 Small Tracked Stone Crusher at Booth 341. The machine features compact size, strong crushing capacity, tracked off-road performance and wide applicability for mining, quarrying and construction waste recycling. As a top Chinese manufacturer of construction and mining equipment serving over 50 countries, the group views the exhibition as a key step in global expansion and welcomes worldwide industry partners to visit its booth for cooperation.
511 Mortar Spraying Machine: The all-rounder for building coating, achieving the efficiency of ten people with just one operator!
Professional spraying made easy! CNMC3000 Inorganic Fibre Cotton Sprayer – Specialised for Underground Car Parks / Sports Halls / Tunnels!
