Operation of inflatable craft with low-pressure (HND) offers incredible comfort on the water, but often results in physical exertion on land. Moving a heavy hull with a fixed motor and battery to the descent without wheels is a real challenge for the owner's back, which is why installing transom wheels is one of the first and most important steps of tuning after buying a boat.
The installation process requires care, as PVC material does not forgive mistakes during drilling, and the wrong choice of fasteners can lead to depressurization of cylinders. In this article, we will discuss in detail all stages of installation, from choosing the right type of wheels to the final sealing of holes, so that your craft is as easy to transport as possible.
Choosing the optimal design of transom wheels for NDND
Before starting work, you need to decide on the type of equipment purchased, since the market offers many variations, not all of which are suitable for boats with a large number of different types of equipment. NDMAThe key is the design of the transom and the way it attaches, which should not interfere with the tightness of the inflatable elements or the installation of attachments, and owners often choose between removable and stationary models, each with its own specifications.
Removable structures are convenient because they do not weigh the boat while driving on the water and do not create additional resistance. However, their installation each time requires time and a tool at hand. Stationary options, fixed on a permanent basis, allow you to immediately start transport, but can interfere with the packing of the boat in the bag, unless there is a special niche or folding mechanism.
- 🛠️ Removable models with brackets fixed by bolts through a transom - require drilling, but provide rigid fixation.
- 🛠️ Stationary systems with a rotary mechanism - the wheels hide under the bottom or fold up, without interfering with planing.
- 🛠️ Universal fastenings on strubcins - suitable only for rigid transom boards, on soft PVC NDND are not put.
It is important to consider the diameter and material of the wheels. For sandy beaches and flat concrete slabs, conventional pneumatic or cast wheels of small diameter are suitable. If you have to overcome rocky areas, gravel or soft soil, you should choose models with a high-performance model. wide-tread and a diameter of at least 250-300 mm to avoid getting stuck.
⚠️ Note: When buying wheels, pay attention to the material of the sleeve. Metal sleeves without bearings quickly rust from salt water, and plastic ones can not withstand the weight of a heavy motor. The best choice is hubs with stainless bearings.
Necessary tools and materials for installation
Well-quality installation is impossible without the right tools. Because we work with polymeric materials and metal, it is important to use tools that do not damage the structure of PVC and provide a reliable connection. Preparation of the workplace also plays an important role: the surface should be clean, dry and well-lit.
Drilling holes in the transom will require an electric drill with adjustable speeds. Using high speeds can lead to melting of the edges of the hole or stratification of the material, so it is better to work at medium speeds. You also need to prepare a set of drills of different diameters, including a cone drill to expand the holes under the bolts.
In addition to power tools, you will need the following materials and accessories:
- 🔧 Marker or chalk for marking drilling places.
- 🔧 Degreasing agent (alcohol or acetone) for surface preparation.
- 🔧 A sealant for PVC or a polyurethane sealant.
- 🔧 Keys of the appropriate size for tightening nuts.
- 🔧 Sandpaper of fine grain for cleaning the edges.
Special attention should be paid to the choice of fasteners. Standard ferrous metal bolts will quickly become rusted, which will spoil the appearance and reduce the reliability of the mounting. stainless-steel AISI 304 or AISI 316, especially if the boat is intended for use in salt water.
Preparation of the transom and marking of anchorages
The preparatory stage is fundamental to the entire operation: A mistake in the marking can cause the wheels to be skewed, causing an uneven load on the transom and making it difficult for the boat to move, first having to completely clear the transom from the sand, silt and moisture using soft rags and degreasing.
Marking should be done with the cylinders deflated or at minimum pressure to avoid deformation of the material during operation. Apply the wheel bracket to the transom and align it strictly in the center or symmetrically with respect to the diametric plane of the boat. Use the building level or visual control so that the axis of the attachment is parallel to the bottom cut of the transom.
After alignment, carefully circle the contours of the mounting holes with a marker. If the design of the wheels involves the installation of reinforcing plates (transe plates) from the inside, they also need to be tried on and marked. NDMA Often, additional reinforcing elements are required, since the soft bottom cannot serve as a support for bolts.
Before drilling, stick pieces of paint tape on the marked areas. This will prevent the drill from slipping and make the edges of the hole more accurate, and also protect PVC from overheating.
Check the symmetry of the markings again. The distance from the left and starboard sides to the holes centers should be exactly the same. Any deviation will cause the boat to fall on one side when moving, which is especially critical when transported by water using a winch or ladder.
Technology of drilling and sealing of holes
The PVC material requires a delicate approach, and the main goal is to get a smooth hole without ripped edges and melted areas, starting with using a small diameter drill (3-4 mm) to create a guide hole, after which you can move to the main diameter corresponding to the size of the bolt.
Keep the drill strictly perpendicular to the surface of the transom. The tilt of the tool will cause the hole to turn into an oval, and the bolt will enter with a skew, which can damage the thread or the material itself. After drilling the edge of the hole, it is recommended to gently clean with fine sandpaper or a cone drill, removing the burrows.
Sealing is a critical step. Even if the bolts have rubber pads, the additional sealant treatment will not be superfluous. Apply a thin layer of special PVC sealant glue or polyurethane sealant around the hole on both sides of the transom.
| Type of material | Drill diameter (mm) | Type of sealant | Polymerization time |
|---|---|---|---|
| Dense PVC (900 g/m2) | 6-8 | Polyurethane | 24 hours. |
| PVC reinforced | 8-10 | Specialized for boats | 12:24 hours. |
| transom board (plywood) | 10-12 | Silicone-acrylic | 4-6 hours |
Insert bolts into the holes, pre-applying a layer of sealant on them, this will create an additional barrier to the penetration of water into the multilayer material of the transom. If the design involves the installation of a response bar on the inside, press it tightly, ensuring an even distribution of pressure.
⚠️ Attention: Do not pull the nuts immediately after applying the sealant. Excessive force can squeeze all the sealant from under the puck, and the connection will remain leaky. Tighten the nuts from hand to end, let the sealant grab (15-20 minutes), and then make the final puff.
Installation of wheels and setting up the mechanism
Once the fasteners are installed and sealed, you can proceed to the final assembly, install the wheel brackets on the prepared bolts and lock them with nuts, at which point it is important to check the freedom of movement of the mechanisms, if they are rotary, and the absence of backlashes.
For boats with NDMA Often, a circuit is used where the wheels are not attached directly to a soft cylinder, but to a rigid transom board or a special platform. Make sure that when the wheels are lowered into the working position, they do not touch the inflatable elements and do not create stress points on the material.
☑️ Installation check
If you use a removable system, check the reliability of locks or screw clamps. The mechanism should withstand jerks when driving on irregularities, but also allow you to quickly remove the wheels if necessary.
Do a test load. Lift the transom over the wheels, mimicking the actual weight of the motor. The structure should not bend, the fasteners should shift. If it's successful, you can consider the installation complete.
Maintenance and care of transom wheels
Installed wheels require regular maintenance, especially if the boat is operated in salt water or in dusty conditions. Sand and salt are abrasives that quickly disable bearings and rubbing mechanisms. After each trip, it is recommended to wash the knots with fresh water.
Periodically check the tightening of the fasteners. Vibration when moving on water and impacts when transported over land can weaken the joints. Once a season, it is recommended to dismantle the wheels, clean the axles of old lubrication and dirt, and apply a new layer. grease.
- 💧 Wash the bearings with fresh water after contact with sea water.
- 💧 Lubricate the axes and swivel mechanisms before each season.
- 💧 Check the condition of the rubber or plastic wheels for cracks.
- 💧 Pull the nuts when you first detect backlash.
Keeping a boat with wheels installed is better in a disassembled form or in a position where the wheels are not under constant load, which will prolong the life of rubber seals and prevent deformation of plastic elements of the structure.
What to do if the wheels start to creak?
A screech usually indicates that the lubricant has dried or sand has entered the bearing. The wheel must be removed, the mechanism must be washed with solvent (kerosene), dried and smeared abundantly again. If the creak remains, the bearing should be replaced.
Frequently Asked Questions (FAQ)
Can you install transom wheels on a boat NDND without drilling?
There are roducine models, but they are designed for hard trans transes. For a soft trans trans trans, NDNDT, drilling is the most reliable and safe method, since rods can damage cylinders or slide under load.
What is the optimal wheel diameter for a boat 3.5-4 meters long?
For boats of this size with an outboard motor weighing up to 50 kg, the best choice will be wheels with a diameter of 250-300 mm. A smaller diameter will fall into the sand, and a larger one will create excess sailing and dimensions.
Do I need to remove the wheels before launching the boat?
Stationary wheels that retract upwards or hide under the bottom, you can not remove. Removable models that are attached outside and protrude beyond the dimensions of the transom, it is better to remove to avoid water resistance and the risk of damage during maneuvers.
What load can a standard mount for 4 bolts withstand?
High-quality mounting on 4 bolts of M6 or M8 stainless steel with the right washers can withstand a load of up to 100-120 kg, which is enough for transporting a boat with an engine and battery.
How to replace a special sealant for PVC, if it is not at hand?
In extreme cases, you can use a high-quality polyurethane sealant for cars or glasses. Conventional silicone for the bathroom is not suitable, as it does not adhesive well with PVC and can detach under the influence of load and ultraviolet light.
Properly installed and maintained transom wheels turn a heavy boat into an easily controlled trolley, keeping you healthy and time to prepare for fishing.