Brompton Pump Mounting Problems: Bolts Too Short?
Hi there, readers!
Are you having trouble mounting your pump on your Brompton bike because the bolts are too short? Don’t worry, you’re not alone. This is a common problem that can be easily fixed. In this article, we’ll walk you through the steps on how to fix the "Brompton pump mounting problems bolts too short" issue, and provide you with some tips on how to prevent it from happening again.
Common Causes of the Problem
1. Using the wrong bolts
The most common cause of the "Brompton pump mounting problems bolts too short" issue is using the wrong bolts. The bolts that come with the Brompton pump are too short. You need to use longer bolts that are at least 30mm long.
2. Not tightening the bolts enough
Another common cause of the problem is not tightening the bolts enough. The bolts need to be tight enough so that they don’t come loose while you’re riding, but not so tight that you strip the threads.
3. Cross-threading the bolts
Cross-threading the bolts is another common cause of the problem. Cross-threading occurs when the bolts are not screwed in straight. This can damage the threads in the pump and make it difficult to mount the pump.
Fixing the Problem
1. Use the correct bolts
The first step to fixing the problem is to use the correct bolts. The bolts that come with the Brompton pump are too short. You need to use longer bolts that are at least 30mm long. You can find longer bolts at your local hardware store.
2. Tighten the bolts
Once you have the correct bolts, you need to tighten them. The bolts need to be tight enough so that they don’t come loose while you’re riding, but not so tight that you strip the threads. You can use a torque wrench to tighten the bolts to the correct torque.
3. Avoid cross-threading
Cross-threading the bolts can damage the threads in the pump and make it difficult to mount the pump. To avoid cross-threading, make sure that the bolts are screwed in straight.
Preventing the Problem
1. Use a torque wrench
One of the best ways to prevent the "Brompton pump mounting problems bolts too short" issue is to use a torque wrench. A torque wrench will help you to tighten the bolts to the correct torque, which will prevent them from coming loose or stripping the threads.
2. Use the right bolts
Another way to prevent the problem is to use the right bolts. The bolts that come with the Brompton pump are too short. You need to use longer bolts that are at least 30mm long.
3. Be careful not to cross-thread the bolts
Cross-threading the bolts can damage the threads in the pump and make it difficult to mount the pump. To avoid cross-threading, make sure that the bolts are screwed in straight.
Table Breakdown
| Problem | Cause | Solution |
|---|---|---|
| Bolts too short | Using the wrong bolts | Use longer bolts that are at least 30mm long |
| Bolts not tight enough | Not tightening the bolts enough | Tighten the bolts to the correct torque using a torque wrench |
| Bolts cross-threaded | Cross-threading the bolts | Avoid cross-threading by making sure the bolts are screwed in straight |
Conclusion
If you’re having trouble mounting your pump on your Brompton bike because the bolts are too short, don’t worry, you’re not alone. This is a common problem that can be easily fixed. By following the steps in this article, you can fix the problem and prevent it from happening again. Be sure to check out our other articles for more tips on how to maintain and repair your Brompton bike.
FAQ about Brompton Pump Mounting Problems: Bolts Too Short
1. Why are the bolts that came with my Brompton pump too short?
The bolts included with Brompton pumps are designed to be used with the brackets provided specifically for Brompton bikes. These brackets are thicker than standard pump brackets.
2. What happens if I use the too-short bolts with a different type of bracket?
The bolts may not be long enough to securely fasten the pump to the bracket, potentially causing the pump to detach while riding.
3. How can I resolve this issue?
You have a few options:
- Purchase a longer bolt (M5 x 25mm or M5 x 30mm) from a hardware store.
- Contact Brompton to obtain longer bolts.
4. What is the recommended length for the bolts?
For use with standard pump brackets, the recommended bolt length is M5 x 25mm or M5 x 30mm.
5. Can I use washers to make up for the short bolts?
Yes, you can add washers between the bracket and the pump to create space for the shorter bolts. However, excessive use of washers can weaken the connection and make the pump less secure.
6. What are the torque specifications for the pump mounting bolts?
The recommended torque for the pump mounting bolts is 5Nm.
7. Can I use a quick-release clamp instead of bolts?
Yes, you can use a quick-release clamp to attach the pump to a standard pump bracket. However, ensure that the clamp is compatible with the bracket.
8. Where can I purchase longer bolts for my Brompton pump?
You can purchase longer bolts from hardware stores, bicycle shops, or online retailers.
9. Is it difficult to replace the bolts on my Brompton pump?
No, replacing the pump mounting bolts is a straightforward process. You will need an Allen key or a hex wrench.
10. Should I replace both bolts even if only one is too short?
Yes, it is recommended to replace both bolts simultaneously to ensure an even and secure connection.
